Accidentally ticked don't show option and wanting to undo this

Question

Hello,

I accidentally ticked the don't show option on a message box in VS2005, my question now is how do i turn that message box back on again. The message box in question is the one you sometimes get when the symbol files and the application you are about to run are out of sync. VS normally asks you if you want to continue without debugging, on this screen I ticked the "don't show again" item, am wanting to undo this as than i at least know when a debug run is lying to me about the values i am seeing in the watch window