The Zoom tool is frequently updated with new features and security improvements, but Zoom doesn’t update its software automatically.
There are several ways to get the latest version, with the simplest one being to download a fresh copy from Zoom.
Go to: https://zoom.us/download
On Mac: Zoom.pkg
On an Apple Computer, you can Check for Updates from the Menu Bar.
If you have problems with the update within Zoom, download the application directly from Zoom at https://zoom.us/download and install a clean copy.