Comments - thepilot1590426626

it's only working on the official steam version.

Sadly, installing over a modded game (and the beta is considered as a modded game) is not supported.

Veryfying the game folder have some effect, but you probably have some leftover inside.
I cannot provide additional support as you modified your original steam folder, it's up to you to revert it. Deleting the FFIX folder entirely should fix it, but I won't be responsible for any harm you do on your computer :)

You have to extract all the files and run the .exe.

Yes (but maybe the PSX font won't work with non-latin characters)

It works like any installer in the world : if something is installed, you can modify the installation, but for moving it, you have to uninstall first. That's how windows works.

You can reinstall with differents options.