Not understanding how this works

Good day, I just bought this plugin to replace a very aging and out of date HomeRecycler plugin. I installed this yesterday, and I have the plugin loading and working via command fine, but the rate and time is default. I have the permission set to default group at default values, and I have it set for a donate group with instant recycle and 100% rate. I'm in the donate group, but I'm not getting any of these settings other than default. What could I be doing wrong? I spent all day testing it and got nowhere so far.

Well I tried many more hours to get this to work, and it simply doesn't work with groups. I would like a refund of this plugin please. I found a another recycler plugin that works for me, because this one doesn't perform as advertised.

Thanks Raul, this is the config here. 

{
  "Prefix": "Portable Recycler",
  "OpenCommand": "recycler",
  "PlayOpenEffect": true,
  "ChatIconSteamId": 0,
  "Rules": {
    "CanUseRecyclerWhileBuildingBlocked": false,
    "CanUseRecyclerWhileCombatBlocked": true,
    "CanUseRecyclerWhileRaidBlocked": true
  },
  "Phrases": {
    "CooledDown": "You're in cooldown.\n<size=12><color=orange>{0}</color> seconds left.</size>",
    "BuildingBlocked": "You're building-blocked.",
    "CombatBlocked": "You're combat-blocked.",
    "RaidBlocked": "You're raid-blocked.",
    "CloseClear": "Your <color=orange>Portable Recycler</color> emptied as you cannot store items inside of it."
  },
  "GroupCooldowns": {
    "default": 30.0,
    "donate": 10.0
  },
  "GroupRate": {
    "default": 3.0,
    "donate": 0.0
  },
  "GroupQuality": {
    "default": 0.5,
    "donate": 1.0
  }
}