fyi; I posted this here
http://stackoverflow.com/questions/22807934/lyx-2-1-rc1-warning-message-the-selected-document-class-article-requires-exte and it was suggested to send email to this mailing list as FYI. Information about the problem in the above link. Basically, I downloaded LyX-210RC1-Bundle-1.exe on windows 7, 64 bit, and after installation, I keep getting the above error. --Nasser
