Shoutbox

I'm not sure what the registry location for this entry is, however this should fix the problem:

Bring up the options menu (Tools -> Options in the contact list). Click the Messages tab. Under the "Offline Instant Message Settings" grouping, choose "Show a link..."

This will prevent the offline messages from showing up when she signs in, instead a small toast will pop up alerting her she has the messages.

I'm guessing if she clicks it the program will crash again...