@Troontjelolo I'm sorry but you must be at least 13 years old to have an account on this website as stated in our Terms of Use. Unfortunately, this means that we have to disable your account.

@NathanMikeska im only 10 and... actully good with computers but i think this will take a while to understand but il try my best! (also i fixed the problem) i only had to remove the XML part in the subassimblies files but il send you the crash files :D

Sorry to hear you are having trouble. After the issue occurs again, can you provide us with your game's log file and a DirectX diagnostic file (via pastebin.com or dropbox or something similar)?

The game log file should be located here:
C:\Program Files (x86)\Steam\steamapps\common\SimplePlanes\SimplePlanesData\outputlog.txt

To get a DirectX diagnostic file (windows only):
Go to windows start menu -> Run -> type "dxdiag" (no quotes) and hit enter -> click the 'Save All Information' button.