ADE closes when I connect my ereader

[#1]

I have installed the application Adobe Digital Edition correctly, and it is authorized in the two mac that I have. When I connect the ereader (Trekstor) the application closes before I can authorize it, and I can not save the books in the ereader. Other ereader Kindel is not visible in the application. What can I do for reading in a ereader? Thanks so much

[#2]

I have installed the application Adobe Digital Edition correctly, and it is authorized in the two mac that I have. When I connect the ereader (Trekstor) the application closes before I can authorize it, and I can not save the books in the ereader. Other ereader Kindel is not visible in the application. What can I do for reading in a ereader? Thanks so much