Not sure what the heck happened; I had it running earlier today. Just tried to crank up THD to play a little D3 and it suddenly is giving me the red text error "Can't read D3 memory. Please use a compatible client and run THD as an administrator."
I literally haven't changed anything. Even tried a fresh extraction in a new directory, same error. Closed the game out, closed the launcher, started over, same problem. I do have Diablo III 2.5.0.44247 so I don't know what what the heck is happening?!?!?