question about the DEMO

I wanto know the flexsim.exe DEMO

The only limitaiton is the saved unit I can use is the 20.

if i dont need save the model ,then ,i can use the whole funciton of the flexsim, is it right,

I just repeat start for each time i use the flexsim?

No there are other limitations. The 2 that I know off are:
1. Random generator is fixed
2. You can't use script to generate objects from the library

There even is no tree and Experimenter is turned off in Demo version.