The trial versions have all the features and functionality of the standard versions, but the problem capacities have been limited. These trial versions allow you to set up and solve small problems, become familiar with the software and all of its features, and make sure you make the right choice.
Models are easy to build and understand using standard spreadsheet equations.
Each download provides everything you need to get up and running quickly. The download versions also include numerous example files that are also discussed in the Help routines.