WAMPDeveloper Pro has expired....Now what??

Whats weird is that even after the software has expired, my drupal site seems to be functioning still??

WampDeveloper doesn't expire entirely. The high-level manager (the user interface) only does (until a serial key is entered). The underlining web-server software continues to function as always. Those two parts are completely de-coupled from each other and run independently. And you can still work with the framework/server directly.

If you need to migrate out your data...

Website files are in folder - C:\WampDeveloper\Websites\domain.name\webroot\

The database can be exported out in multiple ways, via /phpmyadmin URL (login with username: root), or via the command-line -
mysql -u root database.name.here > file.name.to.export.into.sql
_{(use "-p" switch above if you set root's password)}

Now, I am asking the question of why I even used WampDeveloper Pro in the first place?

Because it's awesome. So awesome in fact, that after making everything so simple and quick to set up and run, you forget why you needed it in the first place.