Hi,

There might be a bug somewhere, in my configuration file I have 2 spots for API key

  "io.serverarmour.com": {
    "Owner Email": "mymail",
    "Owner Real Name": "myname",
    "Owner Steam64 ID": "mysteamid",
    "Server Key": "<API KEY>",
    "Share details with other server owners": false,
    "Submit Arkan Data": true
  },
  "io.serverarmour.com API KEY": "<API KEY>",
​

In line 216, we have :

                    } else if (msg.Equals("key assigned to server") || msg.Equals("key assigned to new server")) {
                        config.SetConfig(ref key, "io.serverarmour.com API KEY");

Might be related ?

Read the update notes carefully. You needed to backup and remove your original Config.

Thanks for reporting this.