Game doesn't launch, seems to crash?

[Aman-Anas]

KSSL has been installed into the PDLauncher folder, replacing the existing patcher and config file. However, now pressing play in Steam seems to start it (button turns blue), then it stops (button turns green and says play again). Not entirely sure what's up, I can still launch just fine from the actual KSP_x64.exe file

[R-T-B]

Hmmm. Odd. What Windows version and can you try the prior release perhaps?

Also if you ever changed your steam launch options try clearing them first.