I'm in this exact same situation except that I'm paying almost $3,600 per year for the Enterprise subscription and licenses.  Our company has about a dozen partnerships - some closed, some dormant, only a few pretty active. My boss is 77 years old and is winding down and we really can't afford to keep paying this much money every year, but, naturally, we need access to our data.  I called Intuit and it seems like I'm basically stuck - held hostage as you say.  I'm not sure if my Enterprise files would convert to a desktop version.