How to remove rear view mirror?

[Spruce Goose]

I was able to remove it this morning. The base slides up - I just wasn't using enough pressure. There's a little plastic latch that holds it in place, but if you use enough pressure the latch releases and the base slides off of a metal piece that's glued to the glass. I think that a small screwdriver would release the latch, so that less pressure would be required.