[Q] Downgrade from Lollipop > KitKat before selling phone topic

I had lollipop (resurrection remix rom) installed and now want to get the phone back to stock so i can sell it (booooo)

i flashed a sony ftf from here and now it's back to kitkat
http://forum.xda-developers.com/xper...eases-t2829387

i don't if i'm now supposed to flash the TA backup file and / or relock

i tried running Backup TA but it gets stuck on waiting for USB debugging
already enabled usb debugging on phone, held vol up and plugged it in to PC and got a blue light