This launcher is straight forward. Just extract to the location of your launchpad.exe folder. Click on the server you would like EU / US. It will ask you for the login / password, then it will launch DC with the correct session id that is retrieved.
Note:
If you want it to auto login, edit the .bat files and remove the /p and quotes and insert your username/password like below.
set username=SuperDooperUsernameHere
set password=SuperDooperPasswordForUsername
Update: 6/22/2017: I have fixed the launcher for the latest launchpad version.
Update: 9/21/2017 - XBOX Launcher released
Update: 4/07/2018 - Just updated some notes. This will probably be my last update for another year.