How do I migrate books from an older version of ADE on an old computer to a newer version of ADE on a newer computer?

I have installed various versions of Adobe Digital Edition on a new computer.  The program says it detects books from an older version (which is correct, I copied "my digital editions" from an older computer to a new computer), and asks if I wish to migrate them to the new version.  I say yes, the program tells me the migration is successful, but I cannot see the old books in the library.  How do I get them to show up in the library of the new version of ADE?