The link to Joomla.org forums, although asking how to change the template directory name, actually explains how to change a single template name.
I have installed the free version of the AKEEBA Admin Tools (I enjoy their backup extension) and could find nothing about renaming directories. The paid version (
www.akeebabackup.com/index.php?option=co...em&id=860&Itemid=143
) doesn't appear to have this capability either. The pdf documentation does not elude to directory renaming.
It seems that this request has not been done before? Am I way off base here? Sorry to be a pain.....
Let's take a look at Entropy for J17. The J17 versions have a lot less code in them than their J15 versions. Between Joomla and our template there are 398 matches in 90 files for a hard-coded string containing "