As announced by Nick Bradbury here, TopStyle 4 is FINAL!
Don't worry - we'll keep working on the product. Please use our forum for your feature requests.
A big THANK YOU goes out to our great beta testers. TopStyle 4 would not be where it is today without the feedback from these guys.
As always, make sure to check out the release notes, and please report your bugs to our topstyle.bugs forum.