Loading configuration files is broken or was never implemented fully

This feature is not functional and not intuitive since its the third filter format the designer uses, and rather useless outside the designer.  People get confused with this configuration file and the ftr format (https://ez.analog.com/thread/97968).

If this will only be used by the designer the format should be .mat, which is a lot easier to load.  fscanf is easy to break.