Station Files is the all important location of your JBData folder.
Best practice is to have the On Air software running on an SSD drive C and the JBData and JBMusic folders on a separate audio drive like M (M for Music).
To set the location, click on the gray browse button and browse to the JBData folder.
Hourly Update Time is the time in the hour when command 9999 will remove any unplayed items and makes the first item in the next hour next to air.
If you have shorter items, you can tweak the time closer to 5930.
If you find that you are dropping numerous items, it is a good indicator that you need to reduce the overall number of items in the shell or in your music scheduling software.