I received the error "EoCApp.exe - System Error" - The code execution cannot proceed because steam_api64.dll was not found. Reinstalling the program may fix this problem.
This is odd because I'm using GOG Galaxy and have never used Steam to play it before at all. Is it possible the latest hotfix that was pushed to clients, but the steam version of the update was sent to GOG Galaxy?
I have the same problem, I closed the game and it stardet an update and now it won't launch, I tried reinstalling but it still won't launch, after reinstalling I no longer have a "hotfix" patch though.