Clients have stopped automatically updating

I have had this problem for the last 3 updates of Connectwise Control.  Everytime I update the software on the server, I cannot get the clients to update.  I have to run a convoluted process to reinstall.  I did that on all machines and they won't update again.  Is there a solution to this, or a way to get it done remotely, as takes days to get to all of the remote computers to get them updated.