Do practice CATs, such as the ones from MGMAT, save a copy of the test so that I can refer back to it at anytime? Or is it similar to the GMAT Prep tests, where once I am done and exit, I cannot go back and review questions I missed?

I am asking this because my plan was to spend, let's say, a Saturday taking a practice test, and then go back on Sunday and do a comprehensive review of the questions I've missed.

I just need to know if the comprehensive review MUST be completed right after the test, or not?/

Thanks!