May be it needed may be not...
When i work with vmix in some installations i use many videos, futages and etc... And in some time i think - if i save preset - may be all source files used in project saved with "config" file in one place(folder) ??? But i can very fast transmit this place(folder) to "backup" machine

AND - in some cases USB-Dongle to activating vMix is very helpfull. In some times i work in "foreign" hardware with vMix... Peoples, which have this servers, PC - can't buy vMix to all live. And in this cases - i install vMix to this hardware, BUT - it dont work whithout MY USB-Dongle.