Adobe have discontinued support for ADE (I discovered this when windows 10 decided to update from an older version I was running to a newer version), and I contacted Adobe for help in deauthorising my PC authorisations and setting up new ones on the same PC.
I eventually got around the problem by googling how to clear my Adobe authorisations by doing the following:
https://community.adobe.com/t5/digit...0239519?page=1