I had the same problem with the v2 ATR... Got pretty far on the third floor and then entered the room with no exits and had no choice but to quit. I've played the v3 ATR several times with no issues.
Any idea when the first episode is going to be released? Consider me a subscriber once you publish some content. I'm an 800XL junky and I know the XEGS ran a lot of the same software that I loved on my XL.