Make sure you have dev unlocked and you flashed a custom recovery (CWM or TWRP both work fine)
After that, you need to make sure adb works (if you can't figure out how to do any of this, I will not help you. If you can't find out basic things about Android, then you shouldn't have s-off)
So, as we all know, HTC has made it so with newer bootloaders, you cannot downgrade to older firmwares. Well, this is true except when the software version changes but the hboot version doesn't. So all we need to do is this:
Boot into recovery
echo "1.29.651.10" | dd of=/dev/block/mmcblk0p19 bs=1 seek=160
adb reboot bootloader
fastboot oem lock
then just flash an RUU of 1.29 and it'll work out. All you do is flash the misc partition to contain the proper mainver and it works.