I've attached a script below that will send that key combination. You can import it via the DisplayFusion Settings > Functions > Scripted Function > Import Scripted Function.

Once you have it imported, you can create a trigger that uses the "Window Created" event, and then add your application to the "Process Filename" match condition. You can then run that script in the action pane. Depending on how long that window takes to fully load, you may want to add a "Wait" action, before you send the key combination.

Hope that helps!