I have a 1-CPU license on a VPS with 4GB RAM but it won't upgrade to 4.2.2. Tells me I have to upgrade my license to a 1-CPU license. (AFAIK, it is a 1-CPU license. I assume a VPS license will not run on a system with 4GB RAM. The license was purchased and installed through a 3rd party.) I would like to upgrade to an Ultra VPS, but I can't get 4.2.2 to upgrade. What is my best course to upgrade my current license to an Ultra VPS. I am also considering a 2-CPU license for the caching. Can I install a trial 2-CPU license over the current setup?