Okay, I've done some more experiments using Jon's tip about how to remove colors via the Preferences menu (since I was unable to Select the folders in the Tree). I have narrowed the problem down.
Viewing My Documents from the User Folder under C:/Users/Dave/My Documents:
Starting with no colored folders I can select any folder. Then if I apply a color to the My Documents folder, I can no longer Select the folder (as I've said before, by this I mean that when I click on My Documents to Select it the Highlighted spot jumps back to the last folder I selected and therefore denies me the ability to view the My Documents folder). Then, I go into Settings/Preferences/ File & Folder Labels, and delete the color for My Documents. This alone does not solve the problem - I still cannot select My Documents folder. But if I close Opus and reopen, now I am once again able to select and view My Documents.
Viewing My Documents from the Libraries/Documents/My Documents
The problem manifests itself completely differently from this folder. Starting with no colors again (and no problems selecting any folders in or under My Documents). I select a color for the My Documents folder. No color is displayed on the screen for the folder but the color is listed under Settings/Preferences/File & Folder Labels. I can select the My Documents folder with no problem but again, the folder is not colored on the screen. Okay, clear the color under Preferences, restart Opus. Now I color a subfolder under My Documents. The color shows on this subfolder but now I cannot select the colored subfolder. Remove the color using Preferences and the color goes away but I still cannot select the subfolder, until I restart Opus and then everything is normal again.
Now Jon, how is my problem NOT related to coloring folders? While the color itself may not be causing the problem, coloring the folder MUST cause something else to happen that CAN cause the problem. I even tried uninstalling and reinstalling the Opus application - no change. All right guys, I'm done with Beta testing. What do I do now? I've got 17 days left on my evaluation period - it's not going well. I mean I love the product but like I said, coloring folders is a necessity. Any suggestions?