Hey carsten.
Thanks. In order to remove the archive and date from the filename, I had to remove part of the name generation function in the mpdf_helper.php, on line 57/58.
Oddly… when i remove lang(‘invoice’) in the pdf-helper.php, my footer disappears.
so on line 37 mpdf_helper.php I just changed the operator from !== to ==… don´t whether that was smart. seems to work though 