Not sure if it is a bug or not, but when I go into preferences, click on 'Values' tab, and select 'Service Schedule' I get the following error "An exception of class NilObjectException was not handled. The application must shut down." I was not attempting to change anything when it occurred, just looking around.
EDIT I think it is a bug. I tried to add a new Vendor and got the same error when I tried to save. Then the program just shut down on me. But when I reopened the program, it had saved the information I had typed in.