'''Printer “Original Prusa i3 MK2 Multi Material 2.0” is not present on list of Printers. There is only “Original Prusa i3 MK3 Multi Material 2.0“. I have MK2.5 and do not know if final GCode for MK3 MMU2 will be same as for MK2.5 MMU2.'''
Don’t forget to re-run the Configuration Wizard in Slic3r PE in order to select the MMU2. Otherwise you won’t be able to select it in the printer profile drop-down.