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Maybe try hitting the "check for updates" button? Or right-click the game name and hit "Repair"? This sounds like an issue with itch. What OS are you on?

I just tried both of those to no avail. I don't know if this means anything to you but I looked at the file more closely, aka I went to Properties>Security>Advanced, and it says "Owner: Unable to display current owner." I also went ahead and submitted this problem to itchio's compatibility watchlist. Which is located at: https://github.com/itchio/itch-compatibility-watchlist

Oh, and my OS is Windows 10.