Quote - > Quote - > Quote - The crazy thing is, I was using Reality last night! I know everything is up to date. 

Only now I can't seem to change anything in the file either. hmmm. 

Did you try to set the Geometry format to: Lux native on the Output tab? That was the solution for the problem I had the other day. Doc pointed me to this solution.

Reality wasn't even opening up in DAZ Studio :(

Curiously, I opened up Windows Task Manager and found 2 daz studio processes trying to run. Closed those and now everythin works fine again. Colour me puzzled!

At least everything is working again lol

I'll try to explain how this happens to me regularly.  One way is when D|S crashes on me.  Sometimes the first process will not stop; but, still allow me to open studio again.  It's then that reality will not open.  I'm sure you already figured it out yourself; but, if this happens again where reality will not open, save your scene, close studio, check your task manager to make sure all instances of studio are gone and then reopen.  That should get it fixed every time.  Issue is with studio and it's irrational behaviour when it crashes.