I actually like the BBM App. Its intuitive and all the Black in the UI is bad arss. Blackberry should promote the app via commercials and online to get people aware of it.
Well, I have been using BBM for a couple of days now. Verdict: I like it.
That said, if Hangouts on Android 4.4 is truly a complete package of SMS/MMS/Voice/Video all wrapped in one, then I will not be using bbm. I'll keep it as a backup though.
Just open the app and enter your email again. The same one you entered for the waiting period.
I never received the email, and just entered my email again and it worked right away.