Hi again Steve,
Apologies for the long delay.
I've just installed AWC version 4.7.53 on a Vista Home Premium (32 bit) PC, and can replicate the crash.
After starting AWC minimized, I restore the main window and select Add from the main dialog box.
In the Select Folder popup, I scroll down, close the Computer branch and expand the Network branch.
The network branch expands and shows the same network targets I normally see in Windows Explorer, however without doing anything else, a few seconds later I get the Error popup described earlier.
If I use the method you suggested (hold shift while clicking on Add), I can successfully add my network target (\\DNS-323\Volume_1\MultiMedia\Pictures) into the text box, and AWC does parse and display the photos on the network share - thanks for posting that tip.
The Select Folder popup appears to default to the folder currently selected in the main dialog box when you click on Add. If my network share (added via the shift Add method), is selected when I click Add, the above crash occurs immediately after the Select Folder popup opens (likely because the Network branch is already expanded).
Cheers,
Dave
Edit - I just tried dragging and dropping a network share. This also works properly.
Edit2 - Uploaded a screenshot of the Error message and placed it inline.