Hi Malcom,
It is great to see beautiful images and for me it is very pleasing to know that APT helped in data gathering
I put significant amount of time to struggle with disconnection. Canon's library is not friendly at all in this case. As you know EOS utility doesn't have such button at all. Will try to reproduce the problem on 32bits Win7... BTW looking at my habits I see that don't use this button too much. I simply close APT and then stop the camera. Anyway will try to fix it for the next version...