When I upgraded to 419, I skipped over 328. I had some very minor issues with 419 and I thought I would try out 328. Man, was that a mistake. I did a backup through DM prior to installing the new (older) OS. Can I restore 419 by restoring from the backup or do I have to reinstall 419? Does the DM backup only back up the data or does it backup the operating system as well?