Why Backup FSX Custom Settings and Add‑ons

Microsoft Flight Simulator X (FSX) remains one of the most flexible flight simulation platforms, allowing users to fine‑tune every aspect of their flying experience. From custom camera views and control assignments to complex add‑on aircraft, scenery, and weather engines, a typical FSX installation can accumulate hundreds of configuration files. Losing these customizations due to a system crash, accidental deletion, or a corrupted update can cost hours – sometimes days – of re‑configuration. A robust backup and restore workflow is not optional; it is essential for anyone who invests serious time in FSX.

Regular backups provide peace of mind. They let you experiment with new add‑ons, tweak performance settings, or even reinstall Windows without the fear of losing your meticulously crafted setup. Moreover, backups enable you to roll back a problematic add‑on without affecting the rest of your configuration. This article walks you through the key files to protect, the most reliable backup methods, and a clear restoration process so that your FSX custom settings and add‑ons remain safe through any disaster.

Identifying All Critical FSX Files and Folders

Before you can back up effectively, you must know exactly which files control your customizations. Many users copy only the fsx.cfg and assume they are covered, but add‑on aircraft, scenery libraries, control profiles, and user‑interface tweaks live in multiple locations. Below is a complete list of high‑value items.

Core Configuration Files

  • fsx.cfg – Primary configuration file located in %APPDATA%\Microsoft\FSX\ on Windows. This file stores display settings, sound, weather, aircraft selection, and many slider‑based tweaks.
  • Standard.xml – Located in %APPDATA%\Microsoft\FSX\Controls\. Contains your standard keyboard and joystick assignments. If you use custom control profiles, each may have its own XML file.
  • cameras.cfg – Found in the FSX root folder (e.g., C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\). This file holds all camera definitions – including user‑created views – but note that custom camera edits may be stored in %APPDATA%\Microsoft\FSX\cameras.cfg depending on your installation and permissions.

Add‑on Data and Scenery

  • SimObjects folder – Inside the FSX root directory. Contains all aircraft, boats, and other AI objects. Add‑on aircraft install into subfolders here. Some third‑party installers also place files in %APPDATA%\Microsoft\FSX\SimObjects.
  • Scenery folder – Also in the root directory. Add‑on scenery (airports, landmarks, mesh) is frequently placed into its own subfolder (e.g., Scenery\MyAddon). The Scenery.cfg file (in %APPDATA%\Microsoft\FSX\) tracks which scenery areas are active and their priority order.
  • Effects folder – Contains visual effects files (.fx). Third‑party weather or particle add‑ons often include their own effects.
  • Gauges folder – Many payware aircraft install custom gauges here (.cab or .gau files). These are essential for the aircraft to function.

User Data and Saved Flights

  • Saved flights – Located in %USERPROFILE%\Documents\Flight Simulator X Files\. Contains your saved situations (.flt, .ws, etc.). Backing these up preserves your progress in complex flights.
  • Logbook.bin – Tracks your flight log. While not critical for add‑ons, many simmers appreciate keeping their history intact.

Special Cases: FSX Steam Edition

If you are running FSX: Steam Edition, the root folder is typically under C:\Program Files (x86)\Steam\steamapps\common\FSX\. The %APPDATA% location remains the same, but Steam may use a different folder for cloud saves. Always verify paths by launching the simulator and opening the Settings panel; the tooltips often show the exact file paths.

Best Backup Strategies for FSX

Not all backup methods are equal. The strategy you choose depends on your technical comfort level, the size of your installation, and how frequently you modify settings. Below are the most reliable approaches, from simple manual copies to automated cloud solutions.

Manual File Copy (Simple and Reliable)

The safest method is to manually copy all identified files and folders to an external drive or a second internal hard disk. Steps:

  1. Close FSX completely to avoid file locks.
  2. Navigate to each critical location listed above.
  3. Select the relevant files and folders, right‑click, and choose Copy.
  4. Paste them into a dedicated backup folder (e.g., D:\FSX Backups\2025-01-15\).

Advantages: No software required, full control over what is backed up, and the backup is immediately portable.
Disadvantages: Manual process prone to forgetting a file; no versioning unless you create dated folders.

Cloud‑Sync Folder (Continuous Protection)

Services like Google Drive, Dropbox, or OneDrive can automatically sync your key FSX folders. However, because FSX root folder is large (often 30‑100 GB), you may only want to sync the smaller configuration files and leave SimObjects and Scenery for occasional manual backups.

  • Create a symlink (symbolic link) from %APPDATA%\Microsoft\FSX to a folder inside your cloud drive. This keeps your settings synced in real time.
  • Alternatively, use a backup app that supports selective sync and schedule it to run daily.

Advantages: Automatic, off‑site storage protects against drive failure.
Disadvantages: Large add‑on files may quickly consume cloud storage; upload speeds can be slow.

Backup Software (Scheduled and Incremental)

Tools like Macrium Reflect (free edition) or Paragon Backup & Recovery can create incremental backups of your entire FSX folder and configuration. Set up a weekly schedule that captures changes without re‑copying everything.

  • Create a backup job that includes both the root FSX folder and the %APPDATA%\Microsoft\FSX folder.
  • Store the backup images on an external USB drive or a network attached storage (NAS).
  • Test restoration at least once every few months to ensure the images are not corrupted.

Advantages: Efficient use of space (incremental), easy to restore entire installations.
Disadvantages: Requires learning the software; full restores can be time‑consuming.

Version Control for Configuration Files

Power users can place their fsx.cfg, cameras.cfg, and control profiles under Git or another version control system. This allows you to track every change, roll back individual settings, and even share configurations with other simmers.

  • Initialize a repository in your backup folder.
  • Commit changes after every major modification (e.g., after installing a new aircraft).
  • Use a private GitHub repository or a local server for storage.

Advantages: Granular control, infinite history, ideal for experimenting.
Disadvantages: Steep learning curve for non‑programmers; large binary files (aircraft, textures) cannot be versioned efficiently.

Step‑by‑Step Restoration Process

When disaster strikes – a failed add‑on, a corrupted config, or a fresh OS install – follow these steps to restore your FSX custom settings and add‑ons.

1. Prepare the Backup Files

Access your backup location. If you used a disk image, mount it or restore the image to a temporary folder. Verify that your backup contains:

  • Full copy of %APPDATA%\Microsoft\FSX
  • Copy of fsx.cfg (often inside the same folder)
  • Copies of custom add‑on folders from SimObjects, Scenery, Effects, Gauges
  • Scenery.cfg from %APPDATA%\Microsoft\FSX
  • Control XML files from the Controls subfolder

Do not skip verifying file integrity. If some files are corrupted or missing, proceed only after you confirm a clean backup.

2. Remove the Existing (Damaged) Setup

If FSX is still installed but misbehaving, uninstalling add‑ons one by one can be tedious. A safer approach is to rename (not delete) the current %APPDATA%\Microsoft\FSX folder to something like FSX_old. This forces FSX to generate a fresh default configuration when launched. Then you can copy your backup over the new default files – merging them cleanly.

For the root FSX folder, rename the SimObjects, Scenery, Effects, and Gauges folders similarly, replacing them with the backup copies. If you are doing a clean Windows install, install FSX fresh (or use the Steam download) and then copy the backed‑up folders over the default ones.

3. Copy and Merge Backup Files

  • Copy the backed‑up %APPDATA%\Microsoft\FSX folder and overwrite the current version. If you renamed the original folder, the copy will be the new active one.
  • Copy the backed‑up SimObjects, Scenery, Effects, and Gauges folders into the FSX root, allowing overwrites. Your backup may contain add‑ons that are no longer installed – that is fine; FSX will simply load them if they are present in the Scenery.cfg.
  • If you have a custom Scenery.cfg, replace the file. Otherwise, FSX may not know about your scenery areas.

4. Verify and Test

Launch FSX. Check the following:

  • Are your control assignments working? Open Settings > Controls to confirm the profile loads.
  • Are your custom aircraft listed in the aircraft selection screen? Try loading one of your favorite payware aircraft.
  • Is your scenery active? Fly to a location you added and confirm the airport buildings and ground textures appear.
  • Are your camera views correct? Cycle through preset views to see if your custom angles are preserved.

If something is missing, do not panic. Scenery.cfg may need to be re‑ordered using the in‑game Scenery Library tool. Control profiles might require you to reassign your hardware in rare cases. Keep your backup immediately available for comparison.

Troubleshooting Common Restoration Issues

Even with careful backups, restorations can hit snags. Here are the most frequent problems and how to solve them.

Missing Add‑on Aircraft

Symptom: Aircraft not showing up in the menu despite being in SimObjects folder.
Solution: Open %APPDATA%\Microsoft\FSX\FSX.cfg with a text editor. Look for the [SimObjectPaths] section. Ensure there is a line for each SimObjects subfolder you copied (e.g., SimObjectPaths.0=SimObjects\Airplanes). If missing, add them. Also check that the aircraft’s aircraft.cfg is properly formatted.

Scenery Not Appearing

Symptom: Add‑on scenery does not load.
Solution: Verify that the scenery area is listed in the Scenery.cfg file. Open Scenery.cfg in Notepad and look for entries with the correct path. If the entry exists but the scenery still does not appear, try reselecting it in the in‑game Scenery Library (untick the area, click OK, re‑enter Scenery Library, re‑tick it, and apply). For complex add‑ons, you may need to re‑run the installer’s configuration tool.

Controls Not Responding

Symptom: Joystick or keyboard inputs do nothing.
Solution: Restore the Standard.xml from your backup. If that fails, delete the current Standard.xml and let FSX rebuild it, then manually reassign your controls. This is rare if you backed up the correct file, but some joystick IDs change on different USB ports – you may need to reassociate your device.

Performance Issues After Restoration

Symptom: Low frame rates or stuttering.
Solution: Your backed‑up fsx.cfg may have been optimized for a different graphics card or resolution. Open the [Graphics] section and verify that the HIGHMEMFIX=1 line exists, and adjust display settings like TEXTURE_MAX_LOAD and LOD_RADIUS to match your current hardware. Running the “Verify Integrity” tool in Steam (for Steam Edition) can also reset problematic files without removing add‑ons.

Maintaining Backup Hygiene

Creating a backup is only half the battle. To ensure it remains useful, adopt these habits.

  • Version your backups. Keep at least three recent snapshots (e.g., dated folders) so you can roll back to a known good state if a new add‑on breaks something.
  • Document your changes. Maintain a simple text file or spreadsheet listing every add‑on you install, its version, and where its files reside. This makes restoration much faster when you need to decide which files are essential.
  • Schedule regular backups. Use Windows Task Scheduler or your backup software to run a backup automatically once a week. Even a simple script that copies %APPDATA%\Microsoft\FSX to a network drive can save you.
  • Test restorations periodically. Every few months, pretend you had a crash and restore your backup to a test folder (not your live FSX). Verify that the files are complete and that FSX launches with your settings.

Advanced Tips for Power Users

For those who run multiple FSX installations (e.g., one for general flying, one for hardcore simulation), or who frequently swap between hardware configurations, consider these advanced practices:

  • Use symbolic links to share add‑ons. If you have multiple FSX copies (e.g., boxed and Steam), create symlinks from each installation’s SimObjects folder to a central repository. Then you only need to back up the repository.
  • Export the Windows Registry keys that FSX uses. While FSX settings are largely file‑based, some add‑ons (especially legacy ones) write paths to the registry. Use Regedit to export HKEY_CURRENT_USER\Software\Microsoft\Microsoft Games\Flight Simulator\10.0 and store it with your backup. This can resolve path issues on a clean OS.
  • Consider a full disk image of your SSD or hard drive containing FSX. Tools like best backup software (TechRadar list) can create a snapshot of your entire drive, allowing a complete OS + FSX restore in under an hour.

External Resources

For further reading and community‑tested strategies, consult these trusted sources:

By following the practices outlined here – identifying every file that matters, choosing a backup method that fits your workflow, and testing your restorations – you ensure that your investment in FSX custom settings and add‑ons is never lost. Whether you are a weekend pilot or a virtual airline captain, a reliable backup strategy lets you fly with confidence.