I have a temporary fix for Nautilus users.
Install nautilus-actions -
sudo apt-get install nautilus-actions
Open it, make an action called Sync With ODrive (or whatever you want, this is the name that will appear in the context menu). Under Command, in the path (clear everything first), type
"$HOME/.odrive-agent/bin/odrive" sync %f"
Now, whenever you right click > Nautlius Actions > Sync With Odrive, it will sync that file/folder. If that folder is not in the odrive directory, nothing will happen.