[Q] Allllrighty then - no touchscreen after firmware flash topic

So it's been a good few days with my M7 given to me by a friend. I am totally new at the whole custom ROM thing but had no problems with root, unlock, s-off, etc. but took me many hours as I've rarely used Cmd functions. Still have stock 4.1.2 sense 5.0. Time to move forward so ..... downloaded TWRP and ROM Installer, etc. Decided to update firmware next as some ROMs need later and lost touchscreen function. No other issues, boots fine into whatever and recovers into TWERP with full function of touchscreen. Should I flash older firmware or can I loaded newer ROM through TWERP to get back in the game ? need to answer calls and texts at some point soon !