When Eudora opens the msg "Eudora was unable to update the registry. Your default mail program has not been changed." It was suggested to put "DefaultMailTo=0" in the Eudora.ini file. Did this but the message still appears. Not a big deal, but annoying.

Any other ideas?

Sure wish Qualcom didn't drop the classic Eudora and had made it truly Win 10 compatible.