Thanks Shirley. Nothing new has been installed though MS and/or Norton may have automatically installed updates which should not have caused any problems (unless of course, ObjectDock Plus s using some exploit, that MS has chosen to close - in which case I wouldn't be the only one having this problem). I have also experimented with shutting down all security and found no change.
Sorry I can't pinpoint the exact point at which the right click started causing a shutdown. I had everything set up the way I wanted, then found some MS Office icons I wanted to use instead of those already being used and that’s when I discovered that right clicking and selecting change icon caused ObjectDock Plus to quit working and the notification from Windows that it would be shutdown. I checked further and found that any right click selection other than "Open" would cause the stop working/shutdown situation. (Interestingly, I can right click in a blank space and add an new shortcut (Word for example) for an additional iteration of an existing item and it will be added to the tab. Right clicking on the new entry will cause the noted failure then when ObjectDock Plus in restarted, the icon for the new entry will have replaced the icon for the old entry, the new entry can then be delete and the change will have been made).
If no solution is found, I may remove the program and reinstall to see if that fixes the problem. Hopefully I will be able to save my current tab settings and reuse them on the reinstalled application – I really don’t want to rebuild something that has taken me several weeks to get working in a way I like.