public static void Check()
        {
            string fin = RegistrySettings.Instance.Read(RegistrySettings.FirstInstallNotification);

            if (String.IsNullOrEmpty(fin))
            {
                string version = "" + ClientVersion.CurrentVersion;
                RegistrySettings.Instance.Write(RegistrySettings.FirstInstallNotification, version);

                string url = WebsiteAccess.GetOurUrl(WebsiteAccess.OurSiteLinkKind.Welcome) + "?version=" + version;
                Process.Start(url);
            }
        }