Weird one, only on one of our machines!
Clicking OK in the Hyperlink window does nothing if an external project file is selected (fine for an internal file). Entering the link manually is fine (works in Preview and output). However, the problem remains if you double click that link and select another external file in the Hyperlink window.
We've restarted RH and restarted the machine. Next will be a complete shutdown/startup of the machine, then probably an uninstall/install of RH, I guess.
Any insight, folks?
Well, the complete shutdown/startup of the machine, and the subsequent uninstall/install of RH, has resulted in no joy.
I logged a Bug Report into RH support.
Previous uninstall had not sufficiently cleaned out the HKEY ... Software registry settings (as per this posting).
We cleaned up, reinstalled, and all is right in the kingdom!