I am a registered owner of 4.5. I had not used the app for some time but now it is asking me every time I try to run it for my reg code, which I enter. It accepts it, telling me "now fully functional" and when I click next I am back to the desktop, every time.
I have uninstalled the app, cleared the registry and all temp folders of any trace of BW, rebooted to verify that it is clean, reinstalled and I get right back to the same every time.
I know V5 is out, I recall asking about an upgrade discount (when V5 was still beta) and I think there was some kind of plan in the works for it but I also am reading V4.5 is better for some things (Securerom 4.8XXXX for instance)