I have a few older projects where I edited the CSS files provided with your extensions. This worked fine until I updated the extension because when I open a project that uses older files, Dreamweaver now automatically updates all files, replacing the CSS and thereby wiping out any changes to I had made. I learned my lesson and now modify the CSS by adding a custom CSS file so in case the extension related files get replaced, my changes are not getting removed.

Is there any way I can stop Dreamweaver from automatically replacing older extension files? I looked in the DW preferences but could not find anything.

Thanks

Hello,
As it is described in the documentation - you should always make all of your changes into a separate custom CSS file.
Our extensions always update the js/css files on update and this cannot be changed/disabled.