Hi. Yes this trial version was used via a licensing structure we were reviewing as an option earlier last year. We still have plans to offer trials for all of our releases in the near future but unfortunatly the trial is not ready now.
Also by offering trials, ability to upgrade to and from, adding licensing for modules and then upgrades on modules always runs with a little overhead too (we want to make sure that by offering a trial this does not set back releases scheduled and therefore have fewer releases per year etc..).
On our list though
For now you can fully test Dynamic Forms latest version on www.betasprings.com. You can login as host/dnnhost there and see if the module will meet your needs. We also offer refunds if the Enterprise or Source Code version is not purchased within 30 days of purchased if you are not satisfied for any reason.
-Chad