[Q] Help flashing official CM12!!! topic

OK, so I got the unofficial of the android development thread thing for the ATT HTC One m8 and just found out that Cyanogen just released a official nightly. So I go to install it, have zip and gapps. I wiped all cache, system, and data. Flashed zip but says error, I'm like wtf. It says I need to update a bininary or something. My android tech skills are at like 5/10 so I'm stuck here. With the unofficial I'm on android version 5.0.1 and I think the nightly I have is 5.0.3 (CM12 I have 2015-01-12 15:25:50). So any thoughts or recommendations on my dilemma please let me know. Thanks