Fields hidden with old version of form defaults cannot be revealed with new version

Issue Summary

I use this excellent module on several dozen sites to hide fields from amateur-ish sys admins. One of the fields that I hid long ago (before propagating these settings to a multitude of sites) was on the main content editing page: "Show only items where" ... the form where you can choose the type of content, whether it was published, etc... I hid this form with version 1.x of form defaults and now with version 2.x I cannot unhide this field. If I turn the module off the form reappears. Unfortunately I have used this (excellent) module to change dozens of forms on dozens of sites (again, because I have a lot of amateurish sys admins and want to hide as many options as possible until they are ready). Is there a way I can reveal this form without disabling the module? I'm ok with editing the database if necessary. Thanks!!