I just went here (http://codex.ww.wp.xz.cn/Upgrading_WordPress) and followed the instructions. Pretty painless process. Hope it works for you. I’m far from an expert so hopefully someone can help you better.
Woohoo! Downloaded/installed the upgrade via FTP and all is right with the world. Thanks for the help, as I was really stressing.
Sorry, I’m a bit dense. How do I go about changing my theme if I can’t access the dashboard?
I tried re-uploading the theme, same problem. Blog works, dashboard not so much