I'm not support, and they are on vacation, but I can tell you this much.
When you get ObjectDesktop Infinite, it is a recurring monthly charge that is ongoing. (hence the term Infinite.) As long as you pay, you can use the software. You pay as long as you use the software.
It is my opinion that you should just buy ObjectDesktop at the one year price, all at once. Then renew yearly as wanted, at a lower cost.
Or just get what you need, be it WindowBlinds, Fences, etc.