If you knew they worked, then you can force them on by entering $shader::enabled=1; into your console.If you encounter any issues, stop using this method.
I'll tryEDIT: just sets it to minimum, i can do minimum but the rest are greyed out
the buttondoes notsay edit
Make sure the folder is not read-only and run the launcher. It should download the missing two shader files.
I even upgraded my video card, but nothing changed
nvm that's a dumb questionhave you downloaded any shader-relevant add-ons recently?