It takes at least one more person to help, preferably strong, so SWMBO is usually not an option. What has happened is that the big pin in back is still hooked into the latch mechanism. The easiest way is to get another person and rotate the top to the side about 10 to 20 degrees to get the latching mechanism out of the notch on the pin. Of course, you have to have all the other attachment points loose (top of windshield, behind seats, defroster cable) It's a little bit tricky, but if you're gentle and careful, it should pop right off.
The other accepted option is to get between the body and the top with a long, slim jawed vice-grip on the pin, and turn it, getting the latch hook out of the pin notch. This would leave some marks on the pin, and be a bit more difficult, with the possibility of scratching paint if not very careful.