hemi426 Straylight315
Thanks all.
For sure it is not the button to toggle between loop all, loop one and no loop. A single track in the βCCR β Chronicleβ I can play with VLC. So yes, I can only play just a single track at a time?
It goes wrong when I right click (in Windows 10) on the folder with all tracks and click on βVLC media player β playβ. Normally it opens the VLC player which immediately starts playing the first track and continues with all the other tracks in that folder.
But doing that on the βCCR β Chronicleβ folder the VLC player is opened but it does NOT start playing anything and when I click on the play button the next window (Open Media) is shown (which I have never seen before using VLC):

However in the process of describing my problem in detaiIs I noticed that the name of the subfolder with the tracks which was extracted from the RAR file is extremely long:

After changing that folder name to a much shorter one

everything was back to normal.
So it all comes down to this:
because of that long folder-name VLC (or Windows) could not find the folder with the tracks.
I have gotten a little wiser again how Windows is (not) working.