And I did authorize my Adobe ID on the new computer.
I hear you Ted - having similar problem. ADE not detecting Sony ereader at all - ever! very frustrating
Hello - the chat service for ADE helped me find an answer. With Sony ereaders, you always need to have the Sony reader app installed on the same machine as ADE. There are some drivers installed with the Sony reader app that are needed. Since I did that, ADE now acknowledges my Sony PRS-350.
Here is a link: https://ebookstore.sony.com/download/
The chat line was very helpful with this; they tell me you cannot call in to get ADE support - you can only use the chat box.