Okay, "Character Table" is activated (has a check next to it), but there's nothing in the "Alias (override)" or "Regular Expression (custom override)".
You said:
Go to Options > Plugins, Updates, Fonts > Click to Examine and Configure Plugins...
Is the checkbox next to "Character Table" activated? If yes, click on the text and look whether there are entries in "Alias (override)" or "Regular Expression (custom override)".