Many early version crashes were resolved in newer builds. Ensure you are using at least Frosty Mod Manager v1.0.6 or the Beta5 version , which includes updated SDKs and better game profile detection.
Three things happened simultaneously that finally killed this bug.
: In Frosty, go to Tools > Options > Launch Options and try disabling Platform Launching if you encounter errors starting the game.
Use the "Import Mods" or "Add Mod" button to load .fbmod files, then click Apply and Launch . Resolving Launch and Loading Errors
The original key was: