Please ignore this post. I actually took the time to read the instructions:
"Please, don't use your old save files, as a lot of bugs can happen. "
Doh! Never-mind.
I downloaded the new version (10b) and received an error on my last saved game when Alex knocks on door.
I'm sorry, but an uncaught exception occurred.
While running game code:
Exception: Switch could not choose a displayable.