Allright, that should teach me.
After installing KOTC2 and the first crash, several programs stopped working. Among them my most essential task manager (omnifocus) and password manager (1password).
This is just awful, I have never had anything like this happening to me!
Same error message every time:
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Reason: DYLD, [0x2] Wrong architecture
Application Specific Information:
dyld: launch, loading dependent libraries
Dyld Error Message:
Library not loaded: /System/Library/Frameworks/OpenAL.framework/Versions/A/OpenAL
Referenced from: /System/Library/Frameworks/SpriteKit.framework/Versions/A/SpriteKit