NOTE: to update you must delete thesse sections in config.yml
kills, deaths, rewards, join, join-first, respawn, killstreaks
and in the xp section the worlds is changed from
to
remove it to disable worlds

Boosters and GUI

New commands:
/pvplevels boosters give <player> <global-personal> <booster 0.0> <time>
/pvplevels gui open <fileName> <player>
/pvpprofile
/pvpboosters

If you want to get the boost prefix add this to your entity {pvplevels_booster_global_prefix}