I want to use hyphen '-' instead of '_'. Is it possible?
I have checked the codes and it appears that you can use hyphen, but you will need to access the Tutorials page to see how it's being implemented in the applications. The tutorials available on the official website will give you an insight regarding the way the application can be used with hyphens and all the features offered.
Tutorials page: http://support.yessoftware.com/tutorials.asp