I have checked weekly for months to upgrade my Innuos Zen mini mk ii.I checked the Innuos web site last week and discovered the 1.4.6, and wrote to Innuos that I could not access the update. When I checked Monday, I was able to update for the first time. Note that a major part of the update is for the Music Library. Be forewarned that last night when I triggered the "Rebuild Music Library" function, it took over 5 hours.