Just reuploaded them all - should work now!
Can you let me know which version you tried to download, by the way?
Please make sure LastManStanding.exe and LastManStanding_Data (folder) are in the same location. If you right-click the .zip file, and choose Extract All, it'll put the right files into a folder for you.
Downloading and running it is working for me, so I don't know what could be the problem - maybe try again later, sorry :(