Plugin config reverting to default

I can't seem to figure this out. After the last hurtworld update some plugins didn't seem to work - but it ended up being that they were out of date. Except one still didn't work properly and I figured it too was out of date - betterchat. It was stuck in it's default state. Whenever I would make changes to the config file and restart or reload - it would change the file back to well... default. It wasn't until a plugin that was updated after the hurtworld update started doing this that I wondered. Advert messages was working fine - it is up to date, and yet all I did was change the color of the text to white from silver and it caused it to start reverting back to it's default state like betterchat.

Does anyone know how to fix this or get around it?

 

Code:

{
  "MESSAGES": [
    "<red>[Rule]<end> <silver>Respect the server.<end>",
    "<red>[Rule]<end> <silver>Building for the purpose of blocking access for other players is prohibited (I.E Radtowns, Roads, and Bases).<end>",
    "<red>[Rule]<end> <silver>Harassment of new players or building in the fresh spawn area - is not allowed.<end>",
    "<red>[Rule]<end> <silver>Use of discriminatory language is not tolerated.<end>",
    "<red>[Rule]<end> <silver>Do not ask the admin(s) to use their powers for anything other than admin business.<end>",
    "<red>[Rule]<end> <silver>Player(s) can only have one "Main" Base, you can have as many claims as you want - but they need to be connected.<end>",
    "<red>[Rule]<end> <silver>The raiding of another players base must end in the destruction of the captured claim.<end>",
    "<orange>[Announcement]<end> <silver><#9500DA>The Monarchy's<end> PvP Arena & Race Track are open for challengers. Contact <lime>Shiftmender<end> to take part in a match - at least two opposing parties must be present to begin a match.<end>",
    "<orange>[Announcement]<end> <silver><#9500DA>The Monarchy's<end> first PvE challenge has opened it's doors. Venture into the frozen stretches of the map - to discover the Tower of <#00FFFC>Frost<end>. The former home of a long absent yeti tamer. The Yeti Tamer's treasures await any adventurer who seeks to best his keeps defenses. Contact <lime>Shiftmender<end> to organize a dungeon run.<end>"
  ],
  "SETTINGS": {
    "MESSAGES INTERVAL": 15,
    "REMOVE CHAT COLORS": false
  }
}

Did I make a mistake? This plugin was working prior to me changing the silver to white. I changed it back to silver but it still changes to default.