public static string lastUsedID; //its never used as its int, so its a string

        public Form2()
        {
            InitializeComponent();
            //check to see if running for the first time (or if the appdata is just gone, somehow)
            LUIDexists = File.Exists(LUIDpath);
            Console.WriteLine("LUID exists => {0}", LUIDexists);

            LUPexists = File.Exists(LUPpath);
            Console.WriteLine("LUP exists => {0}", LUPexists);

            //create files if they dont exists
            if (!LUIDexists)
            {
                LastUsedID LUIDpreset = new LastUsedID("0");
                File.WriteAllText(LUIDpath, JsonConvert.SerializeObject(LUIDpreset));
            }

            //load in last used ID
            String lastUsedIDjson = File.ReadAllText(Path.Combine(appData, "lastUsedID.json"));

            lastUsedID = JsonConvert.DeserializeObject <LastUsedID>(lastUsedIDjson).ID;
            if (lastUsedID != "0")
            {
                textBox1.Text = lastUsedID.ToString();
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            cID = textBox1.Text;

            //save as last used ID
            LastUsedID LUIDnew = new LastUsedID(cID);

            File.WriteAllText(LUIDpath, JsonConvert.SerializeObject(LUIDnew));

            button1.Text    = "Connecting...";
            button1.Enabled = false;

            Form1 form = new Form1();

            this.Hide();
            form.Show();
        }