What's the bottom line for my future with using SONAR Artist?

I've been paying monthly for almost two years.  So now that everything's gone south, I have two concerns:
 
1. What happens to my monthly payments?
2. If they stop, will SONAR stop working altogether, or will it be limited, or what?
 
If it stops working, it basically puts me out of business as a performing musician, since ALL my MIDI work is on SONAR, with the Roland SCVA plug-in.  To find another DAW and remix all those MIDIs would take 2-3 months, during which I would not be able to accept bookings - which is my sole income...
 
I'm going to need to shop around for a new DAW anyway now, but I'm hoping SONAR will continue working for me long enough to let me get set up with another product.