Greetings, do you mean you lost the icon on the desktop?
Please try this workaround:
open Windows Command Prompt (press Windows + R), then type:
%HOMEPATH%\AppData\Local\Ultimate Admiral Dreadnoughts\
There is launcher.exe file, right click on it and make a shortcut which you can place on the desktop
Also, you can try to reinstall the launcher and make sure the shortcut is selected in the settings