Plugins and Add-ons: ILIAS 5.4.4 WkhtmlToPdfRenderer-Plugin

Hi,
is there anybody having the plugin up and running?

What is the correct installation path?
Installation instruction page on GitHub (https://github.com/DatabayAG/WkhtmlToPdfRenderer/blob/master/README.md) says: <ILIAS_DIRECTORY>/Customizing/global/plugins/Services/PDFGeneration/Renderer/WkhtmlToPdfRenderer
but
plugin overview page (https://docu.ilias.de/ilias.php?ref_id=3342&record_id=3142&tableview_id=1&cmd=renderRecord&cmdClass=ildcldetailedviewgui&cmdNode=uo:zz:100&baseClass=ilRepositoryGUI) says only "Services/PDFGeneration/Renderer/"
Is it just a abbreviation of the path above (Customizing/...) or does it mean: <ILIAS_DIRECTORY>/Services/PDFGeneration/Renderer/

Would it make any difference with regards to the problem described in my first posting?

Best regards
Andreas