Just hit the "Export" button on the front of the Logon Studio window, pick where you want to save it, and it will export your logon in .logonxp format.
A few people have had problems with export not working. If you have problems, just zip the logon folder and rename the .zip to .logonxp.
A .logonxp file is just a .zip file with a different extension.

And you're very welcome.