I noticed that the only crashes I see now, besides large script issues, is when Code Completion drops down a list of suggestions. I get an error that goes away quicktly, because I am typing when the error dialog shows and after that error Toad becomes unresponsive.
Can you please capture the error screen or try to explain how it looks like?
Also please take a look in the exception log file in toad and send to us the messages related to the error in code completion. Many thanks in advance!
Can you try the new Bata version and see if the problem still happening?