Do I need to delete the old version before I update?

[Ben9]

I do not find the update-button on the OpenOffice website. Only the Download button. Do I delete my old version (and how do I do that) before I click the Download button? Or how do I update? (Windows)

[robleyd]

OpenOffice doesn't have upgrades as such - you simply install newer versions. If you are currently running some flavour of version 4, there is no need to uninstall.

Close OpenOffice; go to the download site and download the latest version; read the Installation Guide and follow the instructions therein.

[Villeroy]

Close OpenOffice. If the so called "quick starter" shows an OpenOffice icon near the system clock, it is not closed. In this case, a right-click on that icon allows you to close the application completely.

While you are in it: Since many years there is an actively developed successor to OpenOffice called LiberOffice downloadable at https://www.libreoffice.org/download/download/
LibreOffice can be installed parallel to OpenOffice. It is a similar program but not the same.
OpenOffice is effectively dead.