there is no 'offline' connectivity between catalyst and an 'offline PC' version of lighting desk software such as HogPC or MA-PC, in the same way in which both mentioned work with WYSIWYG for example. Catalyst needs DMX to work in that way.

As mentioned above - you can use catalyst software for pre-programming without the dongle, but in your sceario, you will need a DMX device connected to your 'offline' lighting software to be able to get DMX in to catalyst