Apostrophes and quotation marks not formatting

Also spellcheck sometimes turns off. Normally the quotations marks, when typed stay vertical, then shift to slanted once the word has been completed. I have the latest scrivener. Does anyone know what the cause of this frustrating problem is? Have I accidentally activated something, or deactivated it?

Check that Edit/Substitutions/Smart Quotes is checked.

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Moderator Note: I’ve moved your post to technical support, from the Using Scrivener area (which is for posting tips and sharing how you use Scrivener).