At the Hyperlink dialog box, I select File... from the Link
To: drop-down, navigate to the file I want to link to, but when I
click OK, nothing happens.
I think the cause of this problem is that I accidentally
clicked the "Don't show this dialog box again" check box that
normally appears during this process. The last time I saw this
dialog box, I also accidentally clicked "Yes".
I guess my core question is, how do I undo the "Don't show
this dialog box again" check box?
Those "Don't show..." dialogs vary. Consequently, how to tell
you exactly the steps to turn one back on will be a bit difficult
if we aren't 100% sure exactly which dialog it was. However, all
hope is not lost.
Roll up your sleeves and prepare for some Windows Registry
here to visit fellow Adobe Community Expert Peter Grainge's
site and scroll down until you see
Tip 13. Follow the steps outlined there and if it doesn't
fix your issue, come back and we'll do more digging. (I do have a
few other tricks up my sleeve for this)