I have loaded and reloaded ADR for InDesign. When I go to File/Export/EPUB and save to desktop, then click save, I do not go to ADR but back to the INDD document. When I go to desktop, the icon is of a word document, which will not permit me to open it. What's going on (or not)?
Do you mean ADE, Adobe Digital Editions? If so, the problem is the file association on your computer.
Given that you've haven't told us anything all that useful it's impossible to even guess where to go next.
Let's start with this: What operating system, what version of InDesign?