Dreamweaver as custom editor for other file extensions

Question

So, I'm working on a project that requires me to work on some
files with non-standard extensions. Namely, I have some text files
that have a .cm extension, and I have some code files which have no
extension at all. I am connecting to my file store via an FTP
"site" set up in Dreamweaver.
Under preferences->filetypes/editors, I set up ". .cm" for
those two cases, and had selected "Dreamweaver" as the primary
editor.
The files open just fine, and I'm able to edit and save them,
and when I do, the files get "PUT" back up to the FTP server as I
want. However, what I've noticed is that the first time I edit one
of those types of files, and save it, now, from then on in that
session of Dreamweaver, any time I de-focus the window and then
come back to it, the IDE initiates another PUT action of the files
in question, even if the files are unchanged.
However, if I go back into preferences, and remove the
"Dreamweaver" as the primary editor for those two extensions, and
leave that list blank, Dreamweaver still is able to open up the
files as I want, but this weirdness with FTP putting and the
window-focus goes away.
Anyone have any idea why?

Answer 1

This TechNote explains how to add file extensions to be
recognized by DW.
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_16410
Unfortunately, DW does not handle file with no file extension
very well.
HTH,
Randy
> So, I'm working on a project that requires me to work on
some files with
> non-standard extensions. Namely, I have some text files
that have a .cm
> extension, and I have some code files which have no
extension at all.