You may want to post this in the mack section of the forum. As far as your e-mail when you buy pro it entitles you to 6 months of support and upgrades after that your e-mail is no longer recognized. It sounds like LimeWire/Java has become corrupted somehow maybe a driver issue but I am not a mack person.
The link below will take you to the mack section.
http://www.gnutellaforums.com/forumd...?s=&forumid=44