Can`t Edit Menue after activate the HTTPS Plugin

Hi
After I installed and activate the HTTPS Plugin.
Basically all run fine, but sometime I can`t edit the some of the pages.
Generally I can`t edit the menu
I am using the Themes Twenty Ten.
If I want edit the pages or the menu. I have to deactivate the Plug-in, Edit the menu and after again activate the Plugn.
This is not very easy to handle.
Have you an Idea what I can do, to fix this issue.
Best regard
Manfred

http://ww.wp.xz.cn/plugins/wordpress-https/