I logged into https://xenforo.com/customers/ but everytime I try to click on "Get support" it keeps telling me, "XenForo - Error You must have at least one up-to-date license to access this page." So how do I go about upgrading my license from version 1 to version 2? Thanks.
Look for links that allow you to buy a renewal for your license(s). It sounds like your licenses have expired, so your access to new versions are not available until you have a valid, non-expired license.