Thanks for posting!
Could you please confirm whether you are trying to launch the app Illustrator and it is opening Autocad? Or are you trying to open an illustrator saved file and it is launching autocad?
I am trying to launch the app illustator and it is opening Autocad. This also happened previously when I tried to launch the app illustrator and it kept opening up as photoshop.
Did you have the AutoCAD and Photoshop app maximized? The other apps you tried to launch might have opened but were hidden by the maximized apps in the foreground.