All files are Locked in Media Bay

All the files in media bay are locked (see pic att) except a handful. So i cannot save over them or even make a new version, If i create a new preset i cannot save it. What on earth is going on. Have tried reinstall but just the same…
Also quite a few files (VST Presets) are missing

All files or all VST3 presets which is all you’ve shown? What about audio files?

The Steinberg VST3 presets are locked…this is normal, but this shouldn’t stop you opening one in a plugin and saving as a new preset after altering something.

Try to be very precise in what you are doing to resave a preset and what is happening.