I messed up my knee doing Jillian's "30 day shred" DVD, but used squats to strengthen it back up. I think the main thing is to make sure that you're doing proper form and doing them at your own pace.
As for EA Active, I'm not too sure. I'd say keep it and do the things that you enjoy, since you did enjoy part of it. Perhaps you can work up to being able to do them. Maybe not. Only time will tell. But mostly, do go at YOUR pace.
I do know that I would never have done squats before when I did. The problem was that my knee had "healed" but it was still sore at times, so I knew that I needed to restrengthen it. Also, I had just figured out the proper technique for squats (by watching the proper form of kettlebell swings). It was always my big concern of doing them wrong, because I knew that was a guaranteed way of getting hurt. It wasn't until seeing proper form that I realize it could really be beneficial and not just hurting me (even doing it right).
I still haven't gotten lunges, though...lol.
BUT, I'd say--with Doctor's permission/clearance, of course--to go ahead and try them every now and then on your own (so you can do your own pace) and see if you can't strengthen yourself up to more.
(aka Mommy_T) Central US
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Happiness is a butterfly, which when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you. ~Nathaniel Hawthorne
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