problem paying for limewire pro

[DAVAITCH]

Hi All, i'm new to this forum, so i'm sorry if i start with a moan, i am a limewire pro subscriber on my home connection, and to be honest i can't remember the payment method i used to subscribe, only i am trying to purchase pro on another computer, i have downloaded the free version, but when i come to subscribe to pro it doesn't allow me to use my switch card to pay for it, is there another method i can use or can i use my existing account on another computer? your help will be much appreciated.