Trouble with Engage

Help...I've been having this issue a lot lately. Engage works just fine normally, but sometimes when I need to edit an interaction and click on "Engage Interaction" in the Articulate Menu, this window pops up. Typically, the interactions in the presentation is listed, but as you can see, it's showing Quize information instead of Engage. I tried to "Add Existing" but it then only shows the Quizmaker quizzes that I have in my file. I always have to restart my computer to get it to work correctly again. It works fine for a time, but the issue starts up all over again. It's really frustrating having to keep restarting my computer. How do I keep this from happening?