Tinderbox in DTPro

I use Tinderbox (Mac) for planning ,project management and visual brainstorming.Currently I am using my trusty DTPro as a repository of .tbx documents and folders.In this database I use a 2-part view and drag and drop .tbx documents.For DTPro,.tbx is not a known format and a window pops up which I cancel.It is easy to open and view these documents clicking on the documents on the list view.DTPro obviously can’t do a deep search but it can pickup on the items in the titles.Any suggestion for a better usage in this context?