I went through this and deleted the files from the Registry Editor, restarted my computer, ran as administrator, and am still experiencing the crashing issue. ):
I even tried reinstalling and making sure the registry editor file was gone, running as administrator, and still no luck.
It sounds like this might be an antivirus/firewall issue, since you also mentioned that it is deleting the exe. Check if you are able to add vtuber kit to an ignore list. The only other thing I could think is maybe it didn't extract correctly? Could possibly try unzipping using a different archiving program.