The menu option Extensions is no longer available in the Windows menu eventhough it's 'visible' status in 'Menus' also there's no option to manage add-ons or extension in the Help menu.
I have purchased the Pantone Connect libraries and I can't access it. Is there a workaround? Or when will this be fixed?
I'd suggest restoring your InDesign preferences and caches. It often solves interface elements which are missing or mangled. Here's how: