Aeros Backing Track with 5.0

I was able to upload a backing track with no problem, but I can’t figure out how to add a second part, or a second track, or if either of these is possible.

The Aeros must be set to Freeform mode and have Sync Tracks turned off to have multiple backing tracks in a song part, it will add the backing track to whatever part you have selected and open on the Aeros while stopped. To make a new part with a backing track, select the empty part plus sign icon and start the backing tracks import process.

To import multiple tracks into one song you must do the import process for each track.

That process is:
Edit the song
Press Select File
Choose the file from the list
Hit save

Can the imported tracks be sync in Aeros so that beat buddy can follow?