Originally posted by Subudai:

Now, to fix this in GSM head to Program Settings and navigate to Server Shutdown. Tick the box that says Send keys to shutdown the server: and inside the box you type in ctrl+c

Save & Close and you are done.
Click the Perform Maintenance button and GSM should look for updates, apply, restart and all that without hanging.

I hope this solves your issue as well!

This appears to have fixed it up. I must've looked at that a hundred times and not thought to include it in the parameters. Thank you for the help.