I would contact PayPal as well as your bank and reverse the charge.  Then I would stick to the version of Poser that I already have.  I don't understand the need to upgrade to a new version of a program that still does what I need it to do, despite there being a few additional changes that I may or may not like.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi