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With Xtra, did you install another version of it?
Because if you did then you are using the wrong link.
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If you didnt?
I suggest you re-install the editor.
FAT32 sounds familiar, i havent had experience with it messing up the settings before or problems with it. Maybe your computer is resetting itself back to its default settings like from the minute it was installed.
Have you delelted or changed anything that would cause this?