PMDG Ops Save Button Issue

Hi

I am having a small issue with my save button in my PMDG Ops manager.

Whenever I go to my aircraft settings for Air Canada, I can't save any changes I make to the aircraft specific setting.

This is the way I have found to do it:

First go to Aircraft specific settings page and choose my livery.

I press Cancel button first. This will grey out both Cancel and Save button.

Make my changes, this will change the color of the buttons back to blue.

Then Hit Save.

Is this the way how its supposed to be done in the first place ?