same here. I have the same issue. I installed the plugin, activated it and then it should work, right? I clicked on the button “insert link” and I still see the old link section (no link list). So it just doesn’t show up – no error messages or something else.
If you have force refreshed (Shift + F5) repeatedly, I’m not quite sure. I have installed it on multiple client sites, with and without TinyMCE Advanced Plugin, and have never had an issue yet. There may be another plugin you are using which is conflicting with this one. You need to deactivate all others and see if the problem still persists.