Comment by ggm

It's not uncommon for free trials to do things like this. I've used video edit suites which will edit a 5min clip but no more, which watermark the output, which show the edit stream but won't save it.

Personally, I think this is fine. They are pretty explicit this is try before you buy checking it works. Not "use it free for 30 days and then we nag you" fully operational.