That sounds great except for one thing -- where do I find mixxxdb.sqlite? I can't find it in the MIXXX folder or subfolders, it's not in the folder where the music library is located, and a Windows search comes up empty.
Yes, if I can copy a file such as this it would be the answer. Basically here's my plan: my music library contains EVERYTHING, including songs I would never want to play at most events. For car shows, I'll make a playlist of every song I intend to play at car shows. Then, I'll make crates for shows in different locales, as some have younger people who want 70's-80's while others have older folks who want doo-wops. The crates will obviously change with each gig, but I'm making so many changes/additions to the library that I've needed to "start over" a number of times -- hence the need to share with the other computers.
In fact, one feature I like is the drag-and-drop. As I find new music I want to start playing, I'll put it into a "New music" folder and just drag-and-drop into the queue. Later when the songs are normalized and properly meta-tagged, they'll go into the library.