Did you do 'winetricks dotnet20' before installing Sibelius, as AF says in http://appdb.winehq.org/objectManager.php?sClass=version&iId=18415 ?
Did you do 'winetricks dotnet20' before installing Sibelius, as AF says in http://appdb.winehq.org/objectManager.php?sClass=version&iId=18415 ?