TBMM/TBMM/SettingsForm.cs

using System;
using System.Windows.Forms;

namespace TBMM
{
    public partial class SettingsForm : Form
    {
        private MainForm mainForm;

        public SettingsForm()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            mainForm = (MainForm) Owner;
            gamelocation.Text = mainForm.Configuration.GamePath;
        }

        private void browsebtn_Click(object sender, EventArgs e)
        {
            gamelocation.Text = mainForm.SelectGameFolder() ?? gamelocation.Text;
        }

        private void savebtn_Click(object sender, EventArgs e)
        {
            mainForm.Configuration.GamePath = gamelocation.Text;
            mainForm.Configuration.Save();
            Close();
        }

        private void cancelbtn_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}