Commands: /td addarena <worldname> <amount> -> Sets up "worldname" as a TheDropper arena with "amount" Levels/Spawns. You will be teleported to the worldspawn in that arena, then just follow the instructions in the chat.
/td regsign <worldname> <line3> <line4> -> Lets you register a sign for "worldname". You then just need to click on a sign. The sign will look like this: Line1: prefix[configurable]
If you did not set "line3" or/and "line4" in the command, they'll be empty.
Permissions: TheDropper.command -> Lets you execute all commands with /td -> Default: op
Config: The config firstly contains "prefix", where you can edit the Plugin's prefix which will be displayed on all signs. Everything else in the config is only there for saving.