Unable to upgrade to 5.10.03 or higher

I am a subscriber to Zoom, but unable to use for my last two meetings, would not allow me to have audio, had to use a browser.  When I go to zoom, I only get the message "You need to upgrade to 5.10.3 or higher.  Contact your IT department. I do not have an IT department and when I try to upgrade, I cannot because I do not have access to my profile in order to upgrade.  I never get messages from zoom to make me aware of any new upgrades.

When I tried to uninstall Zoom and install, I cannot do that either as I get a message telling me that "You cannot uninstall because you are on a network source that is unavailable."  I have no idea what that means. I need help solving the problem.  I tried the Zoom Chat room but it did not work.  Did not even come close to understanding my problem.

Can someone out there help?