The only other thing it could be is something changed your global Flash settings
Try right clicking anywhere inside the loader then go to settings > folder icon and make sure its set to unlimited
If that doesn't work try going
here to edit your global Flash settings. In chrome it might ask you to download but if you click it you should get on option to just run Flash, other wise internet explorer should work. From there click the globe and folder tab and make sure 3rd party content is allowed.
if that still doesn't work try looking how to do full uninstalls of Flash and all web browsers you have. make sure you follow all steps exactly especial restarting before reinstalling anything
it also maybe worth testing Flash projector versions 11.2, 18, 18sa and 23