My IDE of choice for developing lately has been Komodo Edit. It's lighter than Eclipse and does what I need it to do. Installing and updating on most OS's is easy but on my Ubuntu installation I always have to do a few more tricks to make everything work just right. This post is to help me remember exactly the steps of installing and updating so that I don't need to Google it every time.
tar xvzf Komodo-Edit-8.5.2-13850-linux-x86.tar.gzUpdate this to your downloaded version
sudo rm -r /opt/Komodo-Edit-8/to uninstall it first.