I'm a blues guitar player downloaded the trial software of Magix 2020 to check if good to me to buy. Unfortunately I can't find the 6/8 Tempo for blues to start a project!! even the available loops did not show any of this tempo!
I'm afraid 6/8 time is not among the time signatures that Music Maker does support in its project settings. There's also no soundpool content being produced for this time signature. Sorry.