I figured out how to see the crash log:
Faulting application name: Grimoire.exe, version: 3.8.0.0, time stamp: 0x5f146b36
Faulting module name: Flash32_15_0_0_152.ocx, version: 15.0.0.152, time stamp: 0x53fe7f17
Exception code: 0xc0000005
Fault offset: 0x001569df
Faulting process id: 0xc094
Faulting application start time: 0x01d761f6f1111103
Faulting application path: C:\Users\User\Desktop\grim-3.8-pro-1.7.8-eol-patched\Grimoire.exe
Faulting module path: C:\WINDOWS\System32\Macromed\Flash\Flash32_15_0_0_ 152.ocx
Report Id: e8a6e93a-4a85-46c4-8f13-0d58ae9352b1
Faulting package full name:
Faulting package-relative application ID:
And:
Application: Grimoire.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: exception code c0000005, exception address 5EB569DF
I still have no clue what is going on with this app, it seems to crash on its own.