It's possible the crash is due to a shell extension that has been loaded into Opus, rather than Opus itself. (Especially as the thread just has a number; most Opus threads should have a name if Opus created them itself and knows their purpose.)
If a crash dump was created matching the date & time of the crash, it might shed some light on which module the crash is likely to have come from, if you zip the dump and send it to me via private message or email (leo@gpsoft.com.au).