It is absolutely ridiculous that they have such a mac like folder interface to the app but DO NOT support multiple sublevels of folders.
What I had HOPED to do was break up my top level into year 2007, 2008, 2009 and a General folder then have sublevels of receipts/docs that are year specific in folders below that level.
NEAT?!? This would be SOOOOO easy for you to do!