Can I Disable Default /GMRoll for Module NPC's?

I've recently purchased the Pathfinder: Rise of the Rune Lords anniversary edition on Roll20. This module comes with hundreds of already complete character sheets for NPC's and creatures. However, all of these creatures are set to whisper their rolls to the GM via /gmroll when using their associated macros. Is there any way I can change this to not whisper rolls, without editing each and every character sheet individually?

I've already tried using the Game Settings page to set "Whisper Rolls to GM" to Never Whisper Rolls, and then "Apply Default Settings" in the game. But this only changed it for PC Character Sheets and nothing else. There are still hundreds of NPC entries that whisper the GM. 

Any help is appreciated, thanks!

It will be a two step process. The first step is what you did but the second step is to apply it to existing content.

When I hit "Always Whisper Rolls" and save changes, I can go into the game, hit Apply Default Settings, and "Always Whisper Rolls" will be there with a checkbox.

However, when I try and do "Never Whisper Rolls", Apply Default Settings doesn't have it listed as an option.

It's like you can switch whispering on, but you can't switch it off. 

Beth said:

When I hit "Always Whisper Rolls" and save changes, I can go into the game, hit Apply Default Settings, and "Always Whisper Rolls" will be there with a checkbox.

However, when I try and do "Never Whisper Rolls", Apply Default Settings doesn't have it listed as an option.

It's like you can switch whispering on, but you can't switch it off. 

Try using the Toggle options instead of Never Whisper. I believe there is a current glitch in the system that is causing that problem, and using the Toggle option instead defaults to not whispering, creating basically the same effect.

That works, thanks so much Loren!