This article will review how to add a desktop shortcut
First, browse to https://login.designmanager.com
Sign in with your existing Design Manager username and password.
Click the link in the upper-left corner to Get Desktop App..
It will prompt how you want to handle the file. Choose to Open.
Select YES or OK through any security prompts
This will create a DM icon on your desktop, which will streamline the login process.
It should remember your username, but will still prompt for the password to the account after restarting the system.