As a good Web protocol, you should never trap the user without allowing them to return to a previous page. If I click Support > Community Forum from the main Topaz page, I go there without an easy means of returning. Clicking the Topaz Labs logo takes me to the main Forum page, not the main Topaz page. I have to re-enter topaz.com in the menu bar to return. It would be an easy fix to make.
Just press return in your browser, it’s separate website.