How do I manually remove the agent on a Mac?

The easiest way to remove manually the agent on macOS is by deleting its files and folder.

Go to (hard drive)/Library. You will find a DWAgent folder. Just delete it

Then delete the files below :

(Hard Drive)/Library/LaunchAgents/net.dwservice.agguilnc.plist

(Hard Drive)/Library/LaunchAgents/net.dwservice.agsystray.plist

(Hard Drive)/Library/LaunchDaemons/net.dwservice.agsvc.plist

Finally restart the Mac