It is pretty straightforward if you pay attention
There are a few pop up messages in GMAT Prep that guide you through this process. It actually gives you 2 or 3 chances to complete your test. See below the progression.
You can end your test either when you start or when you end the test (that says unfinished)I have one of my tests unfinished
gmatprep1.gifClick No Here
gmatprep2.gifOption 2: Click No Here
gmatprep3.gifI clicked NO and my unfinished test now says Complete
Thanks for the response, but I have tried this and it hasn't worked. I tried uninstalling, reviewing the questions then trying to end the session...
If there's anyone who has run into this problem a reply would be welcome help!