If it is asking you to go Pro, then it's the free version. Check the "About LimeWire" menu to see for sure what version you are using. Maybe you have several versions installed and the shortcut points to a free

The Pro version should have been downloaded from your Pro page: you can see if it is still active by using the email address you used to get the Pro
http://www.limewire.com/english/cont...pro_lookup.jsp

the free version is on the http://www.limewire.com/english/content/download.shtml page.