Try running the game through a sandbox. Sandboxie-Plus seems like a good choice for Windows systems: https://github.com/sandboxie-plus/Sandboxie/releases/tag/v0.5.0
If Sandboxie doesn’t work, let me know and I’ll try to find a better alternative for you.
Sandboxes create an isolated environment that won’t interact with other programs you have installed on the machine.
This is an extreme solution but it should work temporarily (until the developer responds).