Yes, unfortunately 0.8.1 allowed you to see Molly twice but not technically unlock her. That save will be stuck that way so you will have to return to something before then load into 0.8.2.
Again, really sorry, I made a big mistake in v0.8.1.
After seeing her for the second time (first time in the bar), she should now be a contact in your phone. From then on, she is unlocked and can be found normally. If you click into her icon in the phone, you'll see the events and the criteria for the 3rd event. What is your current status for her in the phone?