There is now an update in /lp it will now display all new commands:

as well as you can now give players boosters using

/lp booster give <player> <multiplier>
Be Warned they must be online to receive booster

i will be working on a fix for this so it rolls out the booster give command when they join even if they are offline, but i am very busy so updates may come out slower then usual as i am also working on an api for all my future plugins, as well as a new plugin called "ItemLeveling" and "SkillLeveling" both of these plugins will be free