1. Is there any documentation on all the fields the 22 fields that you quoted?
I'm afraid not.. I really should try to write up more documentation on them.. The most important trick is to know how to show those columns so that you can see what they contain. To show/hide columns click on the tiny button at the far left of the column header in the grid:
2. In Virtual Folders there is an option of leaving the SQL checkbox unchecked. What feature does that provide?
If you uncheck the "SQL" checkbox, then you just have a normal (non-virtual) group which contains the items dropped into it.
3. How is "My Notes" intended to be used? I see that the SQL checkbox is unchecked.
What exactly are we talking about when we say "My Notes"?