I purchased a system (Windows 7) from a previous jriver user that had jriver installed - version 20 - the previous user changed to another product - I have been had a lot of success using jriver in the meantime and thought that I might consider upgrading - the present version does all I need, but I thought I might upgrade, now that version 24 is available - do I qualify for the upgrade pricing or would I have to purchase a new license?