I was not finding anything that helped me the last 6 hrs - maybe because I don't know what exactly happened.
I wanted to revert from CM11 to AHRD. I've installed everything through Aroma Installer but had it bootlooping. As I thought it might be a CWM issue I flashed TWRP recovery.
Since that - no matter which I use (TWRP or CWM) - I can see recovery screen but for 1 second and then see the HTC splash screen again.
It is M7_UL PVT SHIP S-OFF RH
Apr 12 2013, 12:10:45:-1
Solved by fastboot erase cache!