If on the AWS Options stage of the main install, you get the error message:

This installer does not support AWS EC2-Classic. Only AWS VPC

then you most likely have an older, legacy version of AWS. All accounts created after 2013 have the newer VPC style account which is the one that we support. To convert your account to VPC then see the article below. 

Migrate from EC2-Classic to a VPC - Amazon Elastic Compute Cloud