FLAC files - cannot see them

in the past I've added information to Flac files via Mp3Tag - however, when I now change directory to the folder containing the Flac file for tagging, I see nothing at all. I'm obviously doing something wrong, but I don't know what - can any one help? (I'm running 2.72).

If you refer to the system dialogue for selecting new folders, then this does not show individual files but only folders. So that is as it is.
Check if you have loaded any files. See the statusbar how many files are loaded and how many are displayed.

It could also be that you have applied a filter. Press F3 to toggle the filter.
And finally: check Tools>Options>Tags and the list of supported file extentsions.

Thanks - a filter had snuck into the program that I hadn't noticed - all is now OK