Check in Limewire>about and see if that says pro. Check you connections tab and if you are in leaf mode you should be connected to 5 Ultrapeers not 3. Iff you are you are running Pro
If you are using the same alias in your dock or on the desktop you may still be starting basic, if that is still installed. I am not absolutely sure if the installation of pro deletes the previous version.
btw how much did you pay for the upgrade and was it from
www.limewire.com ?