Bootloader Tools V1.0 by Gsm.Developers free download here

Feature:

Erease / Format
1. Erase boot
2. Erase recovery
3. Format userdata
4. Format System
a - Format chache

Flash:
1. Flash System.img
2. Flash boot.img
3. Flash recovery.img
4. Flash userdata.img
b - Flash update.zip

Unlock Bootloader:
1. Htc bootloader code
2. Htc unlock bootloader by .bin files
3. Check bootloader Unlock/Relock
4. Unlock bootloader by code

Other :
1. adb reboot to bootloader
2. fastboot reboot to normal
3. fastboot reboot to recovery
c - htc reboot to run
e - check fastboot
d - htc bootloader info
q - exit