[Plugin: NextGEN Gallery] Problem with text editor

Hello,
seems NextGen make some trouble for me when I want to add a picture in a post.
Normaly, when you click on the add/insert image/video/media button, you have a pop-up and then different choices of how and what to insert in the post, specially by indicating a html address.
Since the upgrade, there is only NextGEN button: https://www.taiwanmag.net/img-prob.gif

If I deactivate NextGen, then everything comes back. Any advices ?
Thanks