Proper procedure for desktop apps silent install on a new server

We are moving an on premises version 6.12 system to a new server and then upgrading the new server to version 7.5. We will then need to push the desktop apps to all the client machines. Those clients will have v.6.12 desktop apps already installed and connected to the old server.

What would be the proper procedure to update these apps from the new server running 7.5?

Must we first run the -uninstall or will the upgrade and connection to the new server work as expected?

Thanks,

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