Compatibility issue – update needed?

Hi there,

I like your plugin, but for some reason I can no longer manage the locations and add a different menu with condition ‘sub-page only’. I am using this plugin on two websites.

Two questions/suggestions:

1. Strangely (and luckily!) enough the front-end of the website is still working with the conditional menu. Can you help me find-out how this is possible? It may help to solve the issue..
2. Could it be a version conflict wit WP itself? I’m using WP 4.9.1, this plugin has been tested up to 4.8.4; could you please update your plugin and make it work again?

Thanks!

The page I need help with: [log in to see the link]