First time poster here. Up front: Nothing but digital love for DOpus. Acutally, it's almost annoying how well designed and performing it is. No chance I would accept a buy-out from MS if I were you. Your brainchild is just too precious to sell
Enough buttering. Coming from (now un-/fortunately discountinued) CubicExplorer which served me well for half a decade, I found your version of file management just the right thing to adopt. Featuring everything - well almost, see below - I expect from a productivity point of view and more. Again, loooaaads of butter there.
The one thing I am missing though is the option to add files to my favourites and not just folders. Maybe there is some other way - I am sure there is - but single file access via Favorites is something I got used to in CubicExplorer. And now I cannot file-manage without it.
Here's the way I used it: Shortcut to my oldschool timetracking excel / word templates and others.
If it is not too much a hassle to implement this, I would be another already more than happy user.
Speaking of user, I will become a paying customer as soon as I have convinced my family & friends that DOpus is an amazing tool worth buying, I will buy a DOpus Pro License package.
Sorry for the chatter. Go do what you do best or enjoy your spare time. Just wanted to put it out there: DOpus is a time-safer! Five up!