Is it Marlin inside stock E5+ printer? ( old one, laud )
I wonder what to choose in PrusaSlicer. There are:
RepRap/Sprinter
RepRapFirmware
Repetier
Teacup
MakerWare (MakerBot)
Marlin
SailFish (MakerBot)
Mach3 / LinuxCNC
Machinekit
Smoothie
No Extrusion