I cloned a bit outdated Drupal7 to a dev-server and updated Core&Modules (without MegaDrupal).

Everything was tested and worked fine, except MegaMenu-Admin (v1.15), which was the case before too (z-index-issue, jquery-version requirements between some admin-modules).

I downloaded MegaMenu v1.25 and replaced the old module-folder with the new one.

After the update the MegaMenu-Admin worked perfectly... but the actual MegaMenu in the frontend vanished.

There was an error-msg in the js-console about selectors, i fixed them (mdmegamenu > md-megamenu) and no more errors appeared, but the MegaMenu is still not working.

Live-Site with v1.15: https://www.gruner.ch/

Dev-Site with v1.25: http://gruner.ch.cabvs101.nine.ch/

Has the HTML-structure of the menu changed? Are different JS-calls needed? What did i miss here...?

Is somewhere a documentaion about how to upgrade?

Thanks for any help!