I am new to wordpress. Now, i have some question regarding to upgrading of wordress software.
Currently, i am using wordpress 2.2.1 and i want to upgrade it to the latest version 2.3. I have no idea to do it. What are the important file that i need to replace? I'm concerning if i upload all the new files it will affect all my previous posts and its structure.
Thank you in advanced for your help and response.