Public Beta and Time Machine Issues

Today I updated to the public betas. When I did, I found that some of my VPN clients that I need for work were not working. In an attempt to revert back to yosemite, i entered time machine but it did not give me the option to revert to that state. Futhermore, I believe that I am "caught" in public beta version 1. In the app store, it give me the option to upgrade to the second version, but once it downloads and I press restart, it only prompts me to look at the dropdown menu instead of actually restarting and installing the opperating system. Any ideas would be appreciated!!!