The autoinstaller moves all files into gas/changes to modify them. Once modified it leaves them there for you to move back when you are satisfied everythings been done.
On that note I would recommend that you download the files to your computer and then re-upload them. That way they stay 'owned' by you and not apache.
I would also download your gas/changes/backup folder.
Once all is said and done, delete the changes folder in gas/
HTH's
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