As I can see you’ve created a separate topic with the same question:
Please do not duplicate posts.
If you have Desktop Editors installed, you can check if there is an update available via ONLYOFFICE button in top left corner (next to Apple logo) or by using Cmd+U shortcut. If update is available, it will download it and install it directly. It will not remove the app and install it anew, i.e. as a first installation.