if you made a nand before you flashed, you can revert to it, use titanium backup to backup everything, and then wipe and flash TR again. Then use Titanium to restore your apps.
BUT>>> This rom is no longer supported or updated. You should really try out rebornROM or ShellROM.
Personally I liked ThundeROM 1.8 over Reborn. Will probably switch back even though development has stopped.
Poorer battery life(10-12 hrs vs 40+), as well as overall instability (black screen that won't wake up t times, a few random reboots, etc) leads to my preference. This is with the same apps/usage.