After creating new user and then restarting (following problematic first login) I do seem for now to be able to manage accounts, create and export reports to excel, and various other things that took me some time to do earlier in the day while navigating around the application errors.  So, fingers crossed that this remains working.  I will update this thread in the event of further crashes.

And before I hit post I went back to QB and this happened. The event log snap below is the only entry that was logged for this particular crash.

Thanks.