Decompiled source of cracked plugin, found these with a little bit of digging.
Locations:
me.angeschossen.lands.jdIYZ.ZqQkm.java Line #30
me.angeschossen.lands.OgacM.MiYxH.dczQH.MiYxH.java Lines #23 #52 #95
me.angeschossen.lands.MiYxH.OuGnc.java Lines #81 #184
Possible crack prevention code...