Are you able to share what the error is?
Unfortunately we will ending our support for Windows 7 in the near future, but the current deployed version of the app should still be compatible as far as I know.
Viewing post in Itch.io app setup not working on windows 7
The window says something went wrong, and then this is what it said:
Something went wrong
itch-setup, v1.26.0, built on Apr 21 2021 @ 21:48:11, ref 48f97b3e7b0b065a2478811b8d0ebcae414845fd
Get "https://broth.itch.ovh/itch/windows-amd64/LATEST": x509: certificate has expired or is not yet valid:
While performing GET request to https://broth.itch.ovh/itch/windows-amd64/LATEST
while getting latest version
Error during warm-up