The Trial version should not be used for any purpose other than the sole purpose of evaluating ExtendSim to determine whether to purchase it.
It is not recommended to use a Trial version to build models for commercial use unless you are planning to purchase the software within the 30-day trial window. At the end of the 30-day trial period, the software no longer opens so you will no longer have the ability to open, run, or make changes to your model.