Nobody mentioned that you had to use a Zimbra server, I certainly didn't. You also haven't asked before how you can uninstall Zimbra Desktop, you haven't even answered my question about which operating system you're using.
There really are instructions here in plain English on how to install/uninstall products and it wouldn't have taken you long to find them.
Having said that, here's the instructions for uninstalling ZD:
Yahoo! Zimbra Desktop Download and Install FAQ - Zimbra :: Wiki
I believe you were given an answer on transferring the email in your original thread. I'm sorry you feel ZD isn't for you and hope you find something more to your liking.