Scan results window invisible

I’ve just done a full scan, and when it finished, the results window popped up with 16 warnings. These are mostly “unclassified malware” etc, of files I have had years. This is the first scan after a re-install, hence these files haven’t yet been flagged as trusted. I began checking that a true virus wasn’t amongst them when the results window disappeared. It still shows in the task bar, but I can’t get the actual window to show again, even using task manager. Any ideas? Other than re-run the full scan and hope the window doesn’t disappear again?

edit: version 5.5.195786.1383, database updated before scan. Win 7 Pro x64