[GNC] Custom invoices don't work after upgrade

[lomax at clickworkorange.com]

Still locked in battle with my invoice template. While testing a few
changes I noticed they weren't being picked up - because I was editing
the wrong file. A search revealed no less than five(!) different
locations where I had copies of the template files: 

   ~/.local/share/gnucash/
   ~/.config/gnucash/
   ~/.gnucash
   /usr/share/gnucash/scm/gnucash/report/
   /usr/share/gnucash/scm/gnucash/reports/

I guess at least some of these are left-overs from earlier versions.
Perhaps I should apt-get purge and start over. Having perused the wiki
it is my understanding that custom template files should (now) go in
~/.config/gnucash/, but if I put everything in there and dump the other
duplicates I get an error "Template file "cwo-invoice.eguile.scm" can
not be read". My template consists of the following files: 

   cwo-invoice.eguile.scm
   cwo-invoice.scm
   cwo-invoice.css

I also have a config-user.scm in ~/.config/gnucash/ which contains
(load "~/.config/gnucash/cwo-invoice.scm"). Where do I put cwo-
invoice.eguile.scm so that GnuCash finds it?