Reasonably seasoned BPS free user – just upgraded to Pro.
De-activated and removed free version. Uploaded PRO. Activated. Click link for set-up wizard and I just get a blank screen area (wordpress admin OK but no central content where BPS screens / menus would normally display).
Double check your BPS Pro Activation Key. If your Activation Key contains any dots (.) then the dots are part of the encrypted Activation Key. Activation Keys are unique to each website. Each website has its own unique Activation Key. Resave your Activation Key once you have made the corrections.