Many problems solved by deactivating WPFC

Hi there
I have problems with the backend and sometimes also in the front end.

In the backend in did not load things for instance like the Menue on the Edit Menue page only the fields to pick a new Link and the one to pick a menue came but the menue that was to be edited did not appear.
Also an upgrade to 4.7 was impossible with the plug in since it did not load the rest of the page. the “content field” where it would say donloading zip file.. unpacking… did not come.

On the front end it made trobles with contact forms since the where not sent any more.

Eventhough the plugin has lots of good reviews what can I do that I works like a 5* Plugin also for me?

Greedings
Jacob