As you can see from this page: http://www.gnutellaforums.com/showth...5&pagenumber=5 that site you mentioned is a scam site so if you didn't pay for it then you're lucky! (are you sure they didn't charge your debit/credit account?)

If you're running XP then why did you downld LW 4.0.7? That version went out of date 7 months ago. Or there-abouts: http://www.limewire.com/english/cont..._history.shtml

Of course the basic version of LW which connects to 3 peers is free! The pro version which connects to 5 peers is $18.88

To reduce chances of freezing:
* Update your Java: Java 1.5 (take the JRE)
* Reduce uploads to about 70-80%.
* Close all windows you're not using at that time (eg: Monitor, library & connections windows; ie: go to LW menu>View>Show/Hide.)
* Go to Speed & disable Ultrappeer capabilities & press the Apply button.
* Go to Tools>Options>Downloads & tick Auto-clear of completed downlds. And press apply.

*** Don't use the Resume button to continue your incomplete files!!!! Seriously!!! There's better means of continuing your downlds such as a manual search for the topic.

* Wait until LW has completely loaded & accounted for all incomplete & shared files which might take 10 to 20 or so mins before doing anything with LW!!!

See Reducing RAM & CPU use by Verdyp (click on link)