If you don't have to worry about trying to save any of your career saves, just delete all of the folders and files in the "My Documents \ SH4" folder. Then uninstall Silent Hunter 4. In theory, you shouldn't have to do any registry editing, so stay away from that for now. Then do a re-install of Silent Hunter 4: Wolves of the Pacific Gold Edition, but when it gets to the "path", where it shows that it will install the game to "C:\Program Files (x86)\Ubisoft \Silent Hunter...", that's where you want to interrupt and edit that path to a folder that you want. I usually just delete the "Program Files (x86)\" portion of the path anymore, and have it go into "C:\Ubisoft \Silent Hunter..."
Be sure you let it install the DirectX v9.0c that is on the game disk. You don't need the Adobe Acrobat or the UPlay stuff, but you do need the DirectX v9.0c, since the DirectX with Windows 10 does not have all of the library files that SH4 needs.
