ADE crashes on Mac OS 10.13.2

I have installed ADE4.5.6 today. The program starts and I can add new Ebooks by using acsm files. But the program crashes without errors or warnings when I connect an Ebook reader. If I change the order of connecting (connect the reader first and then starting ADE) ADE crashes right immediately after start. I sent an error log to Apple, but I think I will need some help from Adobe.