@kegraham Is the old version of Music Studio still installed and unlocked? There were some third party Vita Instruments that only worked in the older version of Samplitude Music Studio. It might work again if you install Magix Music Maker (with the same user account!) and buy the trumpet instrument from the Music Maker in-app-store because then you have an individual license to use it in Music Maker and Music Studio. It also might be possible to unlock the trumpet instrument in the Music Maker in-app-store for free, if you enter your old Music Studio serial number as Music Makers serial number. But I'm not completely sure it will work because these Vita Instruments are not made by Magix, so Magix probably hasn't the license to give them away for free. Magix' own Vita Instruments usually work fine between programs.