SMF - Just Installed!
If you really want to use an old version, I could send that to you. But the save files are very different and they would mess up your games and main menu settings. You would have to save a backup everything first.
In your windows file browser, type %LOCALAPPDATA% and press enter. Then save a backup for the folder call "Platform_Builder" That's literally everything, including the main menu settings. Store that backup somewhere else.