"Yes, it looks like a very nice program. I paid, not sure, about $100 for VWS, and I have had some problems with it."
So, if Cumulus doesn't cause you problems, and you paid about $100 for VWS, it seems as if you might owe about $100 if you keep using it.
Just my opinion.
By the way, I paid about $100 for VWS and donated about $100 for Cumulus.
George