I found the best thing to do is have both versions of WHDLoad in your C: drawer. Just keep WHDLoad 16.9 named "WHDLoad" and name the new version "WHDLoad17" and manually go through each game and change the icon's default tool to "WHDLoad17" for the games that definitely work with it, and just leave the others the way they are. Or do it the other way around, name 17 just "WHDLoad" and change the icon info for the games that refuse to work with 17 to use "WHDLoad16.9" as their default tool.
