Hello Alteryx,
There seems to be a bug, When you change the settings in a workflow and unselect "Others may download this workflow" and then upload a new version, the Workflow settings gets re-selected again
I would also like to see the "default" setting be something our admin can change to default to deselect this option.
@levell_x_dunn thanks so much for pointing this out. We'll take a look to make sure this is working properly. I love the suggestion @DawnR and we'll definitely keep that in mind as we're looking at this.
Updating this idea's status back to Under Review, to be in line with past product updates.