Before running the 1.4 patch you might try manually changing the path to where the game is installed. If it still doesn't work you will probably need to reinstall the game. Just my opinion, but I don't think changing things in the Registry will help, and unless you know what you're doing you could screw up you're Windows install. The Subsim Store has SHIV v1.5 (The Gold Edition) for $10. You can find it
here.
