Hello there; The trial version is a version that you can download and use right now, which allows the analysis of structures with a maximum of 5 floors, and you can review the reports and drawings in the program interface without sending them to print. In the student version, after checking that you are a student, if you are eligible, it is a version that works with a time lock so that you can use all the facilities of the program for a while, there is no restriction other than time.