ADE crashes when parsing web response, possibly related to authorization?

I have been using this account for authorizing eBook readers, but I also used several computers and operating systems, so I may have used up more authorizations, and also tried to de-authorize the latter when upgrading the machine to keep the number of devices small.

However, one of the two eBook readers is not authorized anymore, and I can't authorize it. (I don't care about the computers – I only read books on the readers – but at least one computer apparently needs to be authorized in order to put eBooks on a device.)

Adobe Digital Editions now crashes when I try to authorize the reader, and the stack trace indicates that it may get an unexpected reply from some web server, so I thought it could help to reset/clear the devices connected with my Adobe ID.

I read in many places that one could ask Adobe for completely erasing all devices associated with my account via the chat system, but the two people I reached there eventually referred me to forum.