Hi Kornilios, thanks very much for your kind words! I've already responded to your question on YouTube I believe.
A very effective way to work around this would be to prepare your multitimbral setup with up to 16 Instrument Tracks in a new Song (Midi channel 1-16, routed to the same Midi Out), and then set this Song as a Root Tab in Studio One's File Browser. From there, anytime you want to recall this, click on the Song Root Tab and drag the Track files right into the song you're currently working on. See attached Screenshot:
You can also see this workflow in action in my latest Studio One Minute found HERE:
Hope this helps! -GBY