I know I have done this but I'm maxed out for the day. I am pretty sure that you can do it if you haven't already used up your lessons for the day.
Review/Revisit/Do Over

I have tried when I have all three of my lessons unused, but a red sign comes up saying they are used up and to expand my membership.

I have tried when I have all three of my lessons unused, but a red sign comes up saying they are used up and to expand my membership.
Yeah there have been more than a few posts on this and it does seem a bloody shame that they won't let you review lessons you've already taken without it counting against your daily ration. One of the reasons I have diamond. Especially if you're reviewing a tactics course, you can blow through 50 lessons in one sitting quite easily. If you really don't have the cash for a year's worth of diamond, maybe you could plan in an occasional month of diamond just to really have a go at the Chess Mentor.
I would like to review/revisit/do over problems/course I have already done previously comlpeted. Chess Mentor will not let me. Is there a way to do this?