The beta account is the same activated account, but you need to set up a password for it. Send me your activated account name to fcatrin at gmail and I'll send you a link to set a password for your beta account.
You will need to use a different RetroX version, so you have to uninstall the current one. It's not complicated, just uninstall all the RetroX related apps from Settings -> Apps, and then install the new RetroX (developer edition
![Smile :-)](./images/smilies/icon_e_smile.gif)
Details here: http://retrox.tv/beta
Thanks!