Here is a visual guide to Registration, Fallback, Unregistered and the Lost Key process for people that held EOS as ERC-20 tokens on Ethereum
EOS Authority3 June 2019- Check status with your Ethereum address on https://eosauthority.com
- Unregistered: https://eosauthority.com/unregistered
- Lost Key: https://eosauthority.com/lostkey

If you have your EOS key, just get started by going to https://get-scatter.com (Uses your EOS private key to sign transactions) and use our toolset on https://eosauthority.com/dashboard