Thank you for your note.
Unfortunately we do not have a developer license in place. Generally, Sitefinity CMS trials are for evaluation/proof of concept purposes only and not for development.
If by chance you are working on client development project, you should be associated with the client's license as it will allow you to gain access to the license and support assisted with the license.
Please feel free to email me directly with any questions you may have at Peter.Dudek@telerik.com
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items