If I set an option via COM, that be persistent after the program terminates?
The options you set via the COM object (novaPDF SDK) are persistent, we do not reset them. This is why we also provide the option profiles.
You may create several option profiles and when printing just set which profile is the active one, meaning what set of options to be used for that printing job. After you set option profile you should see the settings in the novaPDF printer interface.