Hi,
To fix a breaking change that Microsoft introduced late last year I had to change the DFFS installer to write the default NewForm, DisplayForm and EditForm URL to the list schema. This means that changing the URL of a list requires that you use the DFFS installer v2.0.1.0 or later to uninstall and then reinstall DFFS to this list.
In addition to this uninstall and reinstall you must go to the list /Lists/SPJSDynamicFormsForSharePoint to find your configs for NewForm, DispForm and EditForm and change the Title to match the new list URL.
Alexander