How can I go back to Yahoo Clic from Beta Yahoo?

I like the old ones better. On the new one...I'll be typing an e-mail and a little window pops up saying I will be logging off of the e-mail account. Pain in the rear! Then I have to start my e-mail over. Whatever happened to not logging off for two weeks? Can I fix this....or just go back to an older version? Please just e-mail me at sdhegge@yahoo.com