When re-querying after a revision what subject line do you use?

A couple months ago, Agent Awesome read my full MS and very politely rejected it based on how it was. She gave lots of helpful feedback and said if I ever re-worked it, she wanted to take another look. So, speed forward, it's been re-worked and I'm getting ready to send it to her again.

Do I use the standard "Query" in the subject line of the e-mail?

Or, do I say "Re-query"?

And then, do I address it as "Dear Awesome Agent's first name"? (Throughout our e-mail exchanges, she did cut back to using just her first name.) Or do I revert back to the formality and use "Dear Agent's last name" until we re-establish communication?

Sorry if this a bunch of little nitpicky questions, but I don't want to blow my chances by offending her right off the bat (even though she doesn't seem the type) or by doing some huge rookie mistake.

Thanks in advance, guys!

Is it ok to just send the full MS again? Or send her a refresher e-mail and wait to see if she asks for it?

Thank you so much for all your help, Ryan!

Thanks Annie and Shady! I definitely kept her e-mail, since it had all of the suggestions in it. And I never even thought about the passive-aggressive thing! I just didn't want to look like I was crossing a respect line by being all chummy after a couple months of, you know, not talking.