If you already have a Gamer Launch account connect your Facebook account on your user profile first before using Facebook connect to login. Otherwise you may end up with a new account.
A Very Excellent step by step guide for anyone interested in trying out ElvUI.
The "Figgure it out yourself" part of using ElvUI for the 1st time can take several days, this guide should slim that down to an hour or less I'd bet.
Once you get used to the dark theme, you'll wonder why you didnt switch sooner.