EDIT: Ok, the problem was that I did not reboot after uninstalling before attempting to reinstall. At no point did I realize that we needed to reboot until I ran the standalone WindowBlinds installer. Even though the problem is solved, I still wish to thank you for taking the time to look at this.

OS:Windows 11

I just bought my subscription, in case that might help.

Yeah, this is pretty annoying. What's happening that it can't install?
Oh, also, when will Curtians work on Windows 11?
Thanks for your time.