Thanks for the reply, Adam!

I went ahead and specified that property, but it is behaving somewhat strangely.  Each user's document upload folder is several levels deep.  Here's an example of what I specify the property to:

"~/Data/Clients/[ClientID]/DynamicFiles/"

When I do this, the document uploader opens the right directory. However, it allows the user to navigate up one level.  Then it no longer allows the user to navigate upward.  So the user can see all the files in the directories on the same level as the "DynamicFiles" directory. 

What I'd like to do is to be able to turn off the text and buttons that show the directory navigation entirely.  I just want the client to see a list of files and have no idea where they are stored or what the directory structure is.

Chris