[Bug-13550] Designer Launch Error

I`m still using 7.9.x designers with clientluncher for my customer.

{
  "global": {
    "default.application": "Ignition-DF",
    "multicast.address": "231.1.1.1",
    "multicast.receive.port": 4446,
    "lock.configuration": false,
    "logger.level": "TRACE",
    "client.defaults": {
      "timeout": 30,
      "retries": -1,
      "init.heap": null,
      "max.heap": null,
      "use.custom.jre": null,
      "custom.jre.path": null,
      "jvm.arguments": [
        "-server -XX:MaxPermSize=512m -XX:+UseG1GC"
      ],
      "client.tag.overrides": {}
    },
    "autoexit": false
  },
  "applications": [
    {
      "name": "Ignition-DF",
      "description": null,
      "main.class": null,
      "gateway.info": {
        "gateway.name": "Ignition-DF",
        "gateway.address": "http://169.254.139.42:8088",
        "redundant.gateways": []
      },
      "window.mode": null,
      "timeout": 30,
      "screen": null,
      "retries": -1,
      "init.heap": null,
      "max.heap": null,
      "sun.java2d.d3d": null,
      "sun.java2d.noddraw": null,
      "jvm.arguments": [
        "-server -XX:MaxPermSize=512m -XX:+UseG1GC"
      ],
      "last.updated": 1541488977765,
      "client.tag.overrides": {},
      "image.path": null,
      "fallback.application": "",
      "use.custom.jre": null,
      "custom.jre.path": null
    }
  ]
}