ADE does not recognize Kobo Ereader, solutions?

Hello,

For some reason ADE Version 4.5.2 does not recognize my Ereader (Kobo Aura , May 2015) anymore.

The last time that I put books on it in July there was not a problem.

I have been in contact with Kobo. They informed to deautorise the Ereader (with ctrl + shift +E) and than install version 3.0 again.

I have tried everything but it did not work. ADE does not give a reaction on the ctrl+shift+E.

Now I have deleted version 4.5.2 and installed 3.0 again to try again the deautorisation.

This did not work either. ADE is still not recognizing my Ereader or doing something at all.

I have not had this problem before and have no idea what to do next. Kobo informed me to get in touch with ADE to find a solution.

The strange thing is that my laptop (windows) is also telling me that it is a station that it does not recognize.

Anyone who has an idea to solve this situation?

Thanks,

C.