Hello,
I try new client version 4.1.2.2 and found an error that does not allow mounting home directory if we use variable like $HOME or %HOMEPATH% in "export" options.
In onmainwindow.cpp in function ONMainWindow::exportDefaultDirs i find this code -
  if(!QFile::exists(tails[0]))
                    {
                        x2goDebug<<"Path "<<tails[0]<<" not found";
                        continue;
                    }

But function QFile::exists cannot work with variables.
I suggest changing it for something what check tails[0] for ~, $HOME, %HOMEPATH% and replace it with QDir::homePath() 

Regards,
Alexey Vasiliev