I was under the impression that the "DO NOT PRESERVE SETTINGS" is for when upgrading from 1.8 to 1.9 but not within the same version, I guess I was wrong.
Is there another way of re-applying settings after an upgrade? Is there a way of applying a patch on a backup so it can be restored on the new version? That would be useful.
There's a way, not as practical as restoring a single backup file, but definitely faster than setting up everything from scratch again.
Extract the backup file to a folder on your pc, and then manually move the files to your router through WinSCP.
I know these files below are safe to move/restore, there might be more though. If anyone else know about any more files that are safe to move/restore, please leave a comment.
That's what i do everytime i upgrade the firmware, even if it's from 1.9.X to another 1.9.X.
Better be safe than sorry, right ?