Absolutely! All the model files and blocks you create during your 30-day Trial period will seamlessly open in any Model Developer Edition...Individual, Node-Locked, or Floating ExtendSim license.

In fact, once you activate your Trial version, you'll notice the "Trial version" watermark on the model worksheet will disappear.

 

Please note, if you build a model in a Trial version and share it with someone who has a Student version of ExtendSim, they will not be able to open your model. Student versions can only open models built in an activated MDE license or from another Student version.