I have a personal license to ACP v.6

I'm intrigued by ACP Expert, but would like to try before upgrading. I see that one can get a 60-day trial license if you're not already an ACP customer; can I get a 60-day trial license for the upgrade, paying in 60 days if I like it and just dropping back to the version I've already paid for if I don't?

If so, how would I go about doing that, and how much would the upgrade cost if/when I want to do it?

Finally, would I need any other software, other than what I already have for ACP v.6, to run ACP Expert?