How to "reactivate" guests who did not opt in to email but are now members?

Two guests (LaTina Jensen and Jordan Wells) have joined our club. They received the original "thank you for visiting our club" email but did not opt in to receive emails before the pre-set deadline. How can they be reactivated so that they can opt in?

Sherry Campbell
Yawn Patrol #3306
lansingyawnpatrol.com

If they did not opt in, they have been deleted and you will have to add them as guests again 

I tried that. They haven't been eliminated from the Guest List, they just have a line through them. I can't delete them; I couldn't move them to the Member List. I get a message that the names are already in use in one of the lists.

I just discovered the option to re-send the Opt-in email. I'm good now. Thanks, Brian.