I've been working on a new feature to restore a plain SQL using the pgAdmin restore dialog. Internally, it will select pg_restore or psql based on the format.
Now, when restoring plain format the tabs like Data Options, Query Options are not applicable. So instead of going and disabling all the fields under these tabs, I think we can simply disable the complete tab.
I've come up with the following UI design for the disabled tabs. The tabs will enable/disable based on the format selected.