Description
Tired of stutters, long load times, broken scenery, or weird sim behaviour after updates?
MFS Cleaner / Fixer is a fast, practical Windows utility for Microsoft Flight Simulator 2020 & 2024 that helps you clean common caches, manage startup entries, and safely swap DLSS versions — all in one place.
Built for sim pilots who want results without guesswork.
🔧 What does it do?
MFS Cleaner / Fixer focuses on the areas that actually cause problems:
- Clears cache and temporary files that lead to:
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Slow loading
- Stutters & shader rebuild issues
- Corrupt streamed scenery
- Post-update bugs
- GPU shader glitches (yes… those ones 😅)
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- Lets you:
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Manage startup apps via exe.xml
- Control and swap DLSS versions with backup + verification
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👉 By default, it only touches safe cache locations
👉 Advanced actions are clearly marked and optional
⭐ Key Features
- 🧹 Cache & temp cleanup (MSFS 2020 & 2024)
- ⚙️ Startup Manager (exe.xml) with backup & restore
- 🎮 DLSS Manager
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View installed version
- Download versions
- Verify integrity
- Backup & restore
- Apply safely
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- 📊 Detailed logs (deleted / skipped / failed)
- 📰 Live FSNews RSS ticker
- 🌍 Multi-language UI
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English, German, French, Spanish, Hindi
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- 💬 Built-in Discord link
- 🚀 Lightweight & fast (portable or installable)
🧹 Cleanup Actions Included
You can choose exactly what to clean:
🪟 Windows & System
- Windows Temp files
- DirectX shader cache (D3DSCache)
🎮 GPU Shader Caches
- AMD: DxCache, DxcCache, DX9Cache, OglCache
- NVIDIA: DXCache, GLCache, ComputeCache, LocalLow caches
- Steam shader cache
✈️ Microsoft Flight Simulator
- MSFS 2020 caches (Steam & Store)
- MSFS 2024 caches (Steam & Store)
- StreamedPackages (MSFS 2024)
- Content.xml (2020 & 2024)
- Rolling & manual cache files
- Windows Prefetch (optional)
⚠️ Advanced (Optional)
- MSFS 2024 WASM cleanup
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Disabled by default
- Shows a clear warning dialog
- May reset settings/licences for some add-ons (e.g. //42 Flow Pro)
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▶️ How to Use
- Launch the app
- Select the cleanup actions you want
- (Optional) enable advanced options if needed
- Click Run Selected Actions
- Review the log output
🔐 Some actions require Administrator — the app will tell you when.
🛡️ Safety & Notes
- Default actions focus on safe cache cleanup only
- Does not touch Community add-ons or official packages
- Startup Manager modifies exe.xml (with backup)
- DLSS Manager replaces nvngx_dlss.dll (with automatic backup)
⚠️ Advanced features may affect:
- Add-on behaviour
- Settings / licences
- Stability or visuals
DLSS swapping is not officially supported by MSFS — use at your own risk.
🧠 SmartScreen & Antivirus
Some builds may be unsigned, so Windows might show a warning.
To run:
- Click More info
- Click Run anyway
You can verify downloads using provided checksums.
💻 Requirements
- Windows 10 / 11 (64-bit)
- Self-contained .NET 8 build (no install needed)
💬 Support & Community
- Join the Discord for help & updates
- Share logs if something looks off — I actually read them 👀
⚠️ Disclaimer
Use at your own risk.
This tool is designed to safely clean caches and manage specific simulator components.
Advanced features (WASM cleanup, DLSS swapping) may impact add-ons, licences, or stability.
✈️ MFS Cleaner / Fixer
A smart cleanup and performance toolkit for MSFS 2020 & 2024 — clear caches, manage startup, and swap DLSS versions safely, all in one fast and lightweight app.
User Reviews
15 reviews
Version History
v1.4.11 - **DLSS Manager:** Detect `nvngx_dlss.dll` under the install **`Content`** folder as well as the root (fixes MSFS 2024 installs where only `...\Content vngx_dlss.dll` exists). - **DLSS Manager:** Sort install targets so **MSFS 2024 appears before MSFS 2020**, installs **with a found DLL rank first**, instead of alphabetical order (which always put 2020 first). - **DLSS Manager:** Restore backup now creates the **DLL’s parent folder** (needed when the DLL lives under `Content`).
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Comments(129)
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Log In4 days ago
4 days ago
At the moment the WASM cleanup is an all-or-nothing option because some addons scatter files around like confetti at a parade 🎭 and partial deletion can sometimes leave broken configs behind.
That said, being able to choose exactly what to remove inside the WASM folder is a really good idea, especially for people who only want to clear specific addons or problem packages. I’ll definitely look into adding a more advanced selective cleanup option in a future release 👍
11 days ago
11 days ago
Sorry you ran into trouble — but MFS Cleaner/Fixer does not delete your simulator installation folder or your Community addons folder.
It only clears specific cache / catalog paths under places like AppData (for example scenery cache, DCE, WASM cache, and optional Content.xml catalog files). Those are not your whole game install and not your Community folder.
One task removes Content.xml files. That can make Marketplace and owned content look missing or “off” until you refresh things — not necessarily because files were wiped, but because the catalog list was reset.
What you should do: open the sim and go to the Marketplace / Content Manager, find your purchases and addons, and turn them back on / reinstall or enable them as you normally would after a catalog reset. If anything still doesn’t show, use owned items / reinstall there.
If the game folder itself really disappeared from disk or from Steam/Microsoft Store, that usually points to something else (uninstall, manual delete, another tool, Store repair, etc.).
Best regards,
CraigBabyJ
11 days ago