You must be S-off to use this.
( HBOOT is still locked and device is still S-off after flashing this )
S-on
Locked
Hboot 1.55
Proper date for 1.55
No red text
To apply
Download and put in adb folder on pc.
Open command prompt.
Type
fastboot oem rebootRUU
Wait for HTC logo
Type
fastboot flash zip PN07IMG.zip
Once it says finished reboot with power button.
Device may not show a complete progress bar.
As long as it says finished in cmd you are good.
Enjoy
https://www.dropbox.com/s/njkhg5e10tzgz78/PN07IMG.zip