Learn to use SVN :) It's an industry standard, and every open source
project I have experience with uses it. If you're on a PC, use this
GUI:
http://tortoisesvn.tigris.org/
APE 0.5 is the version on Google Code, and it has collision event
dispatching. It's a vast improvement over 0.45.
As for Motor... I haven't tried it. APE seems more user-friendly
somehow, but maybe that's not fair. I'm keeping a watchful eye on
Motor. I think everyone is waiting for someone else to do something
awesome with it.
So, to solve your immediate problem, get yourself APE 0.5 off of the
repos and begin building those awesome games.
As for the future of APE, I haven't been following the list. I have a
good feeling about its future... Alec did a great job, and if he's too
preoccupied to continue, I'm sure others will pick up the ball and run
with it.