In version 1.2 of Additional Options there is a bug in "Add Social Media Profile" module, which is connected with translations.
If the select option called "Custom" is untranslated, inputs for icon FontAwesome / icon URL are visible.
If the select option called "Custom" is localized, inputs for icon FontAwesome / icon URL become invisible / inactive.
Just see this image: http://drzwi.oslonymielczarek.pl/wp-content/uploads/2016/03/social-bug.png
Value for select option "Custom" in every language should be always "custom" and shouldn't be translated.