Open Velocity 2.0 >>
Click on About menu at the top, you would see a small pop-up window where the Build no. would be the latest one (4.0.0.1155)
If you have the latest version of Velocity 2.0, you will not be prompted for an Update when you start Velocity 2.0. If you are prompted for the same, please make sure you download latest version from the link below.
You will need to uninstall the older version, before installing the new one.
Latest Version Of Velocity 2.0 >> Download Now