Add additional location for registry enforced settings for GPO compatibility

[huntsman95]

Referencing the documentation - the registry key for these settings should live under Software\Policies\ShareX vs Software\ShareX so they can be properly enforced via GPO as a policy vs. a preference which can be overridden and does not delete after the group policy setting is removed.

In the interest of maintaining backward compatibility, I suggest the new location be added in the check function(s) of the software vs. outright replacing the existing location as this would create infosec issues in certain deployments.