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Is deleting the WASM folders really necessary after updates?

Featured Replies

Hello Gang.

After the latest update I notice that my MSFS2024 got really stuttery and with less than desirable performance, contrary to the well oiled machine I had going on pre-update. I decided to clean the shaders and WASM folders as suggested by several folks. After deleting the WASM files I noticed that my control assignments got messed up and not even re-assigning them would bring them back. Luckily, I was able to retrieve my old deleted WASM files from the recycle bin, reinstate them, and voila....I got my control assignments back. Is deleting the WASM files really necessary and worth the hassle?

Sincerely,

Dennis D. Müllert

System Specs: MoBo:  MSI MAG X870 Tomahawk WiFi ATX AM5.  CPU: AMD Ryzen 7 9800X3D.  Memory:  128GB Corsair Vengeance DDR5-5600 CL-40.  GPU: 24GB Asus TUF Gaming OC GeForce RTX 4090.  Monitor: LG UltraGear+ 45" curved OLED.  Power Supply: Corsair 1500 Watt 80+ Platinum ATX. HD: 2TB Sabrent Rocket NVME SSD.  Windows 11 Pro.

Flight Sim Hardware:  Joystick: Thrustmaster T16000M.  Rudder Pedals: Thrustmaster TPR Pendular Pedals.  Yoke: Honeycomb Alpha.  Throttles: Honeycomb Bravo.  Controller: XBox Controller

 
 

YMMV. I often do it for ini planes but not others, but I have more crashes with them than the others.

Tired of Streetlights everywhere? Try MSFS DarkStreets today!
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I sometimes do due if any plane acting a bit weird.

I never do this. However, if any problems arise, where the cause is not clear, then keep it in mind.

Guenter Steiner
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Betatester for: A2A, LORBY, FSR-Pillow Tester
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Never done this

5950x3d 5.4-5.7 GHz - Asus ROG 870 Crosshair Apex - GSkill Neo 2x 24 Gb 6000 mhz / cas 26 -  MSI RTX 5090 Gaming Trio OC - 1x SSD M2 6000 2TB - 1x SSD M2 2800/1800 1Tb -  Corsair 5400  case - Corsair 360 liquid cooling set  - 3x 75’ TCL tv.

13600  6 cores @ 5.1 GHz / 8 cores @ 4.0 GHz (hypterthreading on) - Asus ROG Strix Gaming D - GSkill Trident 4x Gb 3200 MHz cas 15 - Asus TUF RTX 4080 16 Gb  - 1x SSD M2 2800/1800 2TB - 2x  Sata 600 SSD 500 Mb - Corsair D4000 Airflow case - NXT Krajen Z63 AIO liquide cooling - 

FOV : 200 degrees

My flightsim vids :  https://www.youtube.com/user/fswidesim/videos?shelf_id=0&sort=dd&view=0

 

I never ever delete anything at all, other than the whole sim in my cycle of uninstall / reinstall 🤣

Lastest updates, for the last 4 months, have been working great with absolutely no cleaning of whatever folders, including Nvidia system shader folders.

I also have quited using that "mantra" of cleaning all nvidia driver footprints, using DDU and similar stuff... Only the Nvidia App, and it works just simple & beautiful, although if you don't want thet App to mess around with your MSFS 2024 settings you have to disable the automatic optimization for the game.

Edited by jcomm

Flying gliders since 1980

Flightsimming since 1992

AMD Ryzen 5600x, 32GB RAM, GPU Nvidia RTX 3060 Ti 8 GB, 1 TB and 500 GB nvme2 SSD drives, HP 27" 60Hz LED monitor @ 1920x1080, T16000, Hotas from old X52 Pro, Saitek Combat Rudder Pro (2010 model)

Haven't deleted WASM folders so far in 2026. Alls been going well. knock on wood.

Bill McIntyre

Asus StrixB650E-F Gamer, AMD Ryzen 9 7900X3D, Corsair Titanium DDR5 64GB, Samsung 990 PRO-4TB M.2, (4) 2TB SSD's, Corsair H1150i liquid cooler, RTX 2080TI Founders Edition, (2) LG 34" HD Curved Monitor, Sound Blaster Audigy X, 1Kw PC Power & Cooling Power Supply, Corsair Obsidian Full tower Case. MSFS 2024, WIN11 Pro x64                                                                                                                                             

I don't even know where the wasm folder is.

The sim does it automatically when you launch a WASM aircraft for the first time after an update.

Edited by Tuskin38

2 hours ago, Tuskin38 said:

The sim does it automatically when you launch a WASM aircraft for the first time after an update.

yep. but when that process or result gets corrupted for whatever reason and/or the AC show erratic behaviour it may help or at least does not harm to delete the WASM to force MSFS to recompile the WASM from scratch. Not only do some AC developers suggest so but it also helped on my end with RJ and CRJ some time ago. now telll me that was placebo ;-)

Phil Leaven

i5 10600KF, 32 GB 3200 RAM, ASUS 4070 12GB EVO, Asus ROG Z490-H, 2 WD Black NVME for each Win11 (500GB) and MSFS (1TB), Rolling Cache 16GB, Photogrammetry always OFF, Live Weather and Live Traffic always ON, Res 2560x1440 on 27"

It was a fairly recent change, I want to say SU3?

Edited by Tuskin38

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