I'm trying to get Eudora to work smoothly under Windows 7. I know it is obsolete, but I have specialized filters and Perl scripts that are not portable to other email clients.
When Eudora starts in Windows 7, it displays the error dialog "Could not install Eudora MAPI because
MAPI32.DLL could not be renamed", followed by the error dialog "Eudora was unable to update the system registry. Your default mail program was not changed.".
This article says that Eudora needs to be the default mail program in order to prevent this error. In Windows 7, Eudora is not listed as an option in the list of default programs. There is no option to add any new programs. Other articles on how to add a new default program suggest adding a file type association for the new program. However, Eudora is already associated with the .MBX file type, but it still is not available on the Default Programs list.
This question says applications need to "register", but the answers (and the linked MSDN article) do not explain how that is done.
How can I make Eudora the default mail program under Windows 7?