Lectora crashes while function "place drop point" and "place hot spot"

Unfortunately I had no success to use the advantages of interactive user support.

I tried to configure a Test based on drag & drop as well as on hot-spot functionality.

Unfortunately in both functions Lectora crashed.

How can I use this functionality?

Are there any known bugs?

Exists there a patch, which fixes this instablity of application function?

Hope you can help me,

Sabine