Minor XML changes doesn’t work

Hi,

after updating to Kodi 17 on a Linux Mint PC as well as a Windows 10 system I now want to do some minor changes in a few XMLs of the Estuary skin (to get familiar with the skinning). F.e. I’d like to move the year of the playing song in MusicVisualisation.xml behind the song title instead of the album title. After I edited the two lines in the XML file, it worked fine for the moment but when I restarted Kodi everything was like it was before my changes. Is there any cache I have to delete or any other place where the skin addon is stored? I worked in /usr/share/kodi/addons/skin.estuary/ because the kodi folder in my home directory is the old one of Kodi 16.

I’d appreciate any help.

Harry