On condition Early Access client app was not updated before the beta profile expired, user will not be able to launch the application.
To update the profile delete Early Access app (tap&hold on it until it starts to jiggle, then tap on the x appended to the app icon). Then press and hold the Home button and Sleep/Wake button together for ten seconds, ignore the slide to power off message.
After just turn the device on normally, and open this page: http://insight.readdle.com/i on your iPad or iPhone. And tap on the blue installation button to start download. Simply choose 'Install' on the pop up message. Launch the app and submit your Early Access login and password to finish set up.