"You can cancel your subscription at any time and keep using the engine, though without monthly updates." If you are really tight on cash then I guess that you

"You can cancel your subscription at any time and keep using the engine, though without monthly updates." If you are really tight on cash then I guess that you can check the change log and only pay the 20$ for the month for crucial updates. Paying for product updates is usually a big red flag for me but since it got down from several tens of thousands of dollars up front then this is not such a bad deal.