You may try our products and tutorial at any time. Please register and login to our download area where you will find our free trial software, examples, uses cases and documentation.
We also offer a 6 weeks trial with the full functionality of JOpt supported by email for 595 Euros, only. If you are interested in this please drop us a brief email at firstname.lastname@example.org. We recommend that you have already played with the free trial software and that you have your working source code project at hand.