Um not much detail. What do you mean you paid for the update? Did you buy it at the official Limewire website? http://www.limewire.com/english/content/download.shtml And is it called LW Pro when you look at the About LW under the help menu? When it opens does it come up with a window asking to update to pro? Which version is it?

We need some more details. It's difficult to understand your problem.
Can you give us a total desciption of your set up:
1. OS version? (eg: Windows 98)
2. What firewalls you have?
3. ram? 4. HDD space available?
5. Connection type? (eg: dial up/cable/broadband)
6. Modem & router brand name & model numbers?
7. Where are you trying to connect from (home, school, work, etc.)?
8. Which version of Limewire & Java do you have?
9. Explain in detail what happens when you open LW.