Plop Boot Manager freezes

[NumOpen]

When I start my computer with Plop Boot Manager, the first menu appears. As I move in the menu with up or down arrow, the screen freezes (excepted the backgroung that stays animated).
https://framapic.org/QlPTRXVN6xms/Se0Vl3ztO3cJ.jpg
Same problem with a Plop CD-ROM or with a MultiSystem USB key with GRUB2+plpbt.bin file :
menuentry "Plop Boot Manager 5.0.15" {
  search --set -f /boot/img/plpbt.bin
  linux16 /boot/img/plpbt.bin
}