Hi Everybody,
This sequence worked for me, it may work for you. Until I followed this approach, using the 566.36 (last known usable drivers for app filters) failed to load more than two filters.
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Steps to get Nvidia app filters working in MSFS2024
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1. Right Click on Start an go to Settings\System\Display\Graphics
A. Confirm Optimizations for Windowed Games is Enabled
B. Hardware Accelerated GPU Scheduling is Enabled
2. Install the latest Nvidia Graphis Drivers - Perform a Clean Install
3. Install the latest Nvidia App
4. Open Nvidia App
A. Select Settings
B. Ensure Nvidia Overlay and Game filters and Photo mode are Active
C. Next go to the About page and activate the "Opt. in to access beta or experimental features"
D. Next go to Graphics/ Global Settings
E. Look for Shader Cache, set the size to your preference, turn on the Automatic Shader Compilation (beta)
F. Left mouse click the three dots (upper right corner), select clear cache and then Compile now (beta)
G. Close Nvidia App
5. Install Nvidia Drivers 566.36, Do Not Install Any Options Other Thank The Drivers
A. Perform a Custom Install
B. Check the Perform a Clean Installation checkbox
6. Run MSFS2024 and you should have all your filters available for use.