I made some unwise changes to my windows8.1 registry base.
Now, for all folders the name of which contains a dot, everything after the dot (and the dot iself) do not display, which frightened me a lot at first when I could not find my .git folders!
In "folders options", I have already checked that
-- "display hidden files and folders" is selected
-- "hide files with a known extension" is NOT selected
-- "hide protected OS files" is NOT selected
The directories display normally in DOS bowes