upgrade 2.3.1

First, a bit of relevant history. I installed v.2 in 12/06 just to learn something about how blogs work. I changed the header, linked to my website, wrote a few posts, and installed on both a local and remote server.

Now, I’m about ready to begin blogging in earnest so I decided to upgrade to the latest version 2.3.1 and, after some confusion on my part, I have successfully installed locally, but I’m right back were I was as a new user and don’t know how to import my changes to the previous version of WP. In fact, I can’t seem to find where I might confirm that I’m actually using the current release. Are either of these things possible or do i start (re) building from the ground up?

Any help is greatly appreciated.

msw