About 8 months ago I've tried your product, versions 4.35 if I recall correct.
Since it's support for .net entity framework was in early beta stages, and did not fullfill my expectations, I decided not to use it at that time.
However, EF got RTM, your product may have been more matured (on EF aspect) but now I cannot try it again (on the same computer) since 30 days have certainly passed by.
How this problem can be solved ?
My suggestion is that at least reset your trial license data at major releases like 4.4,4.5,4.6,4.7 etc. so users can try the new versions fixing major bugs that existed in previous ones.
Trial period have passed ,newer versions cannot be tested
Trial Expiration
We have a similar problem. We already bought the commercial version, but to test updated versions, we have to use the trial as we are in a very big company and getting new versions takes weeks via our order department...