Try restoring your new backup. There is a flag in /bootdata that needs to get reset so it boots to the ROM instead of recovery.
If that does not work, go to my HD/HD+ CWM thread linked in my signature and make a new bootable CWM SD per item 1a and use that to flash the plain stock zip from item 6. Follow that with a factory reset. That should make it bootable again.
If you saved your CM11 backup you may be able to put TWRP back and restore CM11.
Sent from my BN NookHD+ using XDA Premium HD app