Hi William
I am a UK Limewire user and have been so since 2004, however, a word of warning, never ever put your full name in an open world wide forum because there are a lot of creeps out there (as well as spammers, 419er, hackers, etc.) that you would not want contacting you.
OK, back to business, I used a credit card to initially buy and update my subscriptions with and never had any problems.
I don't know what link you tried before but click on this one and try again:
Lime Wire » Download LimeWire
UK Bob
PS. Rather than buy LW Pro why not try LW Basic first, plus its free.