Check the running Bitrix24 on the tray
Click the right mouse button on the running Bitrix24 icon in the tray:
Open tree dots and click on “About” and Check for Updates:
if the installed version is the latest then the program exposes this:
in otherwise case, it proposes to download the new version.
Before installation log off all users on the server and Exit in the Bitrix24 of your running session on the server
After installation recheck the current version within “About”