The Anderson web site gives information somewhere on how to remove the pins. At least, ISTR it was that site. I did find info on this just a few days ago. Pushing the spring part down before pushing the pin back helps. The spring is the flat tab that stays inside the plastic cover. You'd need a small screwdriver in addition to the Power Pole tool (or a second screwdriver or something) and a third hand. It can take quite a bit of force sometimes. If you Google "anderson power pole tool", you should find the info I found.
Personally, I haven't been too impressed with Power Poles. I use the 45A rated pins and find that with 10 gauge wire, the pin barely fits into the cover. It is very difficult to push the pin all the way in with the result that when two are connected, the connection is not solid - wiggling the connectors can result in a broken connection. I can't get the pin the last 1/64" or so to the end of the connector. Anyone else having a problem like this?