I don't have a show computer (FPP user), but I do use multiple computers and I keep a complete backup of everything on a USB drive. I then sync the usb drive to the computer I am working on. But I try never to do any sequence development or layout changes on anything but my primary desktop and I consider that the master unit. So if anything is out of sync I go back to my main desktop and get a fresh copy of everything. My other computers are mainly used for testing or for showing stuff to my wife (on her computer). I do not use the usb drive for anything but as a backup.