Okay, I HATE MS's shitty Image Preview launching by default when I double-click an image. I'd MUCH rather have it open in ACDSee. So, I went at my registry and figgered this out:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{e84fda7c-1d6a-45f6-b725-cb260c236066}\shellex\MayChangeDefaultMenu
Go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{e84fda7c-1d6a-45f6-b725-cb260c236066}\shellex\
and delete the subkey:
MayChangeDefaultMenu
Reboot. Images will now open in your default viewer by double-clicking. You can still right-click and select PREVIEW if you want to open it in Image Preview.
If you want to get rid of the PREVIEW menu option entirely, you can go to
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{e84fda7c-1d6a-45f6-b725-cb260c236066}\InProcServer32
and for the (Default) Value, change the data to the exact location of your preferred image viewer, in my case: "G:\Program Files\ACD Systems\ACDSee\ACDSee.exe"
Reboot. No more "Preview" option on right-click.
Thought some of you might dig it,
Gibletpie