Everything I see at that link is paid to me (except the SimplePress plugin itself). And yes, I’m logged in.
Also I haven’t find any upgrade options for themes and plugins on the Forums page as it’s written in the upgrade manual.
When I go to https://simple-press.com/store/themes/ I see this:
OOPS! Looks like you we messed up and you got directed to an old themes page. Premium Themes.
So no, I won’t try to upgrade to version 6 anymore. SimplePress 5.7 is a great plugin and I like it, but version 6 I would not recommend to anyone. Now you charge for every standard forum function. Look at your prices here: https://simple-press.com/store/add-ons/
$29-$93 for the “Subscriptions (Email Notifications For Users)” forum function, $29-$93 for the “Forum Search” function, $19-$61 for the “Report Post” function etc… For real???