I currently have El Capitan Beta 2 installed on a 2nd partition and I'm a registered developer. My developer account expires in 3 days. When I log into the El Capitan partition it downloads Beta 3. However, I haven't installed it yet because I'd rather have the Public Beta (so as to avoid issues of having a Developer Beta while no longer a developer). When I click on redeem my public beta it doesn't do anything since I already have El Cap installed. What is the best way to proceed to make sure I can get El Cap Public Beta installed? I'm not sure how to convert my Dev Beta into the Public Beta.