message: Error message for empty app version (lib)
diff: @@ -1374,7 +1374,7 @@ error Context::downloadUpdate() {
  }
  if (HTTPSClient::Config.AppVersion.empty()) {
  - return error("Cannot check for updates without app version");
  + return error("This version cannot check for updates. This has been probably already fixed. Please check https://toggl.com/toggl-desktop/ for a newer version.");
  }
  // Ask Toggl server if we have updates
  