Dan:
OK, now I understand why files are being restored frequently.

Aurea:
Try this:
-Go to the command prompt through Windows
-Change to the drive and directory where the data files are located
-Type: ATTRIB -R *.XXX and press [Enter] (where you must replace XXX with the correct file extension)
-Type EXIT and press [Enter] to return to Windows desktop

That should remove the read-only flag.