I'm getting a corrupt zip file when I download 6.2 from itch.io. Tried redownloading and had the same issue. Cannot open with 7zip (IconSet.png is corrupt) or Windows Explorer (will not open at all).
Might have just been unlucky twice. Just double-checked/tested the download on my end and it downloads, extracts and runs fine, so something with your setup is messing with it.
