Same issue here.
Added both “Place via shortcode” and “Show icons after posts”, wanted to keep only the shortcode, found no way to remove the icons “after posts” from the articles.
Deselecting the option “Show icons after posts” and saving – both with “save” button in “Where shall they be displayed?” section and with the general “save all settings” button -> doesn’t work.
Deselecting all “Where shall they be displayed?” options and saving in the options plugin admin page -> doesn’t work.
Checked if was a cache problem: it wasn’t.
Deactivating the plugin: all icons disappear and shortcode remains ad plain text (as expected, and it proves cache isn’t involved)
Reactivating the plugin: keeps last saved settings, and all icons reappears, included the “after post” ones, even if they are NOT selected to show up in the options page. No way to get rid of them, no matter what.
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Your plugin looks very useful, but it’s pretty annoying when a plugin mess up with your db and admin pages and doesn’t reverse back things when required. Means it leaves code around, when and where it’s not supposed to do so – and it’s not really reassuring.