Help - Switching back from custom ROM
I need help. I've got the Verizon Galaxy S4 (SCH-I545), and recently rooted it using the all in one tool from xda. I've also flashed the Google Play Edition S4 ROM, but I want to switch back. How do I go back from the ROM? I'm using ROM manager, and backed up before I flashed the ROM, but when I want to load the backup from before the ROM, it says there is a mismatch and can't restore. Can someone please help me?