Live TV and XMLTV file

So I got a paid xmltv file from hoerzu for AT / DE channels. Downloaded a zip, that includes 3 xml files.

category.xml
channel_y.xml
genre.xml

What should I do or where do I need to place them?
If I place the channel_y.xml in a folder and choose it in the XML TV section

File or URL:
/config/xmltv/channel_y.xml

no data is showing up in the guide.

Screenshot:

If i click on the three dots and choose map channels i see the list of channels. Clicking on the pencil gives me slighty dimmed screen, so I guess a overlay full screen should appear. But I can not edit anything, since there is nothing showing up.

Screenshot list:

Screenshot: CLICKING ON EDIT GIVES ME:

same problem. guides from http://webgrabplus.com/epg-channels