What exactly did the error say? I might be able to help you get it to run.
Ok, I tried opening it again and this time it said:
Error
Couldn't start:
(my sd drive)\users\(my computer username)\OneDrive\Desktop\InsectorTD\Binaries\Win64\InsectorTD-Win64-Shipping.exe" InsectorTD
CreateProcess() returned 2
and that's it...? I think the last time it said something different but I don't remember what
Hmmm I've searched the error and maybe your antivirus software could be causing the issue, Link 2.
It seems like people also get this error if they don't extract the game files before trying to play?