Someone of you or the anonymous (really why anonymous?) replier to my ticket 5190 at 27 Feb 2017 must be wrong. The reply that I got was: Even if I replied to him that currently the only that I need is upgrade to 4.1 as none of the plugins that I use are compatible with 5.0, the reply was the same "You must upgrade to 5.0". So where is the option to upgrade to 4.1 as you wrote before? Edited: When I upgraded my xF license, they didn't asked me to pay for all intermediate versions. And this is the logic. Why to pay for versions that I never downloaded, never used, and never got support for them? Have I downloaded, used, supported for your 4.1 version? No. Edited 2: The same with IPB. My license expired at January 2015. They didn't asked me to pay for the period Jan 2015-Jan 2017. They ask $95 for 6 months ahead.