Hi! Sorry for the late reply I haven't been on the site lately.
First - There's no install, you just open the exe and it should work without any issues
Second - I'm not sure if it works on Windows11, sadly I have no way of testing it since I'm still using Windows10
Sorry for the inconvenience :(
how are you going about opening the file? for me, I used winRAR to open and then extract the files into a folder. after opening, I placed the whole folder on my desktop, and then opened the folder and double-clicked the EXE file. I am also using the latest version of windows, so you should be able to do this as well?