I restored a version of the site from before I did the update to Easy Modal and the modals are working again, except I'm back to the original problem that started this thread - I cannot save any changes to the Theme.
I am now running Easy Modal v2.0.8 on WordPress 3.9.2.
To restate the issue, I cannot save any changes to the Theme using v2.0.8. For all tabs, the menus let me make changes, but when I hit the Save button, it reverts instantly back to the default settings.
I checked the Pages containing Modals again (while running Easy Modal v2.0.8) and, at the bottom of the content page, there is a section called "Easy Modal", but there is no information in the section. The only words I see are "Easy Modal". There is no other text, no settings, no checkboxes, no list of Modals on the page - nothing at all except an empty section called "Easy Modal".
If I update to v2.0.10, I can make changes to the theme, but (as noted above) the modals stop working altogether - there are no Popups.
So the site is working again but not working very well. Since I cannot style the Modals Theme, they don't look good. I still need to find a solution.
If I have to, I can rebuild all the Modals - perhaps that will be the only solution. (Deactivate, uninstall, reinstall, rebuild from scratch.) But I am hoping to avoid that.
I appreciate all your help!