I've done that numerous times, including reinstalling. Always says something like "Not designed for windows or there is an error. Try reinstalling" despite using the links for windows.
System requirements (minimum):
CPU: Athlon / Pentium 200 MHz
RAM: 64 MB
DirectX: 8.1
RAM: 512MB; VRAM: 128MB;
Links to bugfix version 2020
#9,264 are checked, everything works. Windows version should be called
"Rogue-Like2020CE-win.zip"
For unpacking it is better to use the latest 7zip or winrar
You need to start the game from the beginning. You cannot use saves from the main game or mod version. (Only save from version 2020 can be used)
If all the conditions described are met, then there should be no problems (except for minor bugs that can be completed using the "ignore" button)
It is better to download again without errors, properly unzip and play ....