No. As stated in the ExtendSim End User License Agreement regarding the Trial versions:
"... You shall not use the Trial version for any purpose other than the sole purpose of evaluating the Software to determine whether to purchase the Software."
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.