You should reset your playerheadsmenu folder to generate it with updated files.
[ Fixed] Rewards will be given only once now
[ Fixed] Now you can leave already started game without throwing errors infinitely in console
[ Fixed] Fixed some strings and heads lores in heads menu
[ Fixed] Fixed wrong displayed winners in the summary of the game
[ Fixed] Now message "You've been xth" is send only for 4th winners and lower
[ Fixed] Voting for player's plot title is displaying longer now
[ Fixed] Added missing plugin prefix to voting messages
[ Fixed] Now voting immediately after the timer count to 0 to prevent bugs with manipulating vote items