You can click the “Enhanced with DFFS” link to enter setup and then click the Export, import and restore tab > Brower restore points and deleted configurations.
Not sure why you get the error message in the DFFS installer, but ensure you are actually loading the correct installer (the correct URL) – if you have mulitiple DFFS installations (on the root site and in a subsite for example) your form might have been installed with another DFFS installer.
If this is the case, go to your primary DFFS installer and uninstall / reinstall DFFS in this form / list.
Alexander