One. The license is per user, but only for two computers if they belong to the same person (e.g., studio desktop + laptop) and are not used simultaneously. For multiple studio computers, you need additional licenses.
If you've purchased MIDI Quest 11, you can find your serial number in the following locations: midi quest 11 serial number
Understanding Your Midi Quest 11 Serial Number When you purchase Midi Quest 11 One. The license is per user
If you do not have a registration number, the software will operate in . While in this mode: midi quest 11 serial number