hmm... i've never seen this before. generally my advice is to just try re-downloading it in case something went wrong? sorry that i can't be of more assistance!
Yeah, I've been having the same problem too... I extracted the zip file, opened the game, and got the same message. Happens every time I re-download. I think it's something about my anti-virus/software deleting "syrup.exe" because it identified it as a possible security threat.