The change of licensing can only be applied to new purchases. When people buy a product they enter into a contract defined AT THE TIME OF PURCHASE. Contracts cannot be altered retrospectively. It may not be to people's liking that conditions of use are now different but the company is completely free to alter it's terms at any time it chooses. Clearly to avoid confusion or misrepresentation the facts must be stated clearly.
I have no worries about this change. I bought my items under clear conditions of use at the time ... it means I won't buy any future solutions but that's my prerogative. It's a retro move as far as I can see and WA have seemingly thrown away the great buying incentive they held previously. hey ho, that's the way it goes ... sadly? Another one bites the dust!!!!