I have tried changing file type associations in Windows, changing file type associations in Bridge, changing the registry, right clicking and selecting open with, and nothing works. The only way I can do it is to drag my file to the 32 bit PS icon. How do I make 32 bit the default version that opens?
Windows 7 64 bit
The paths should be controlled in the Registry. Make sure they are correct:
32-bit Photoshop: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Adobe\Photoshop\60.0\
64-bit Photoshop: HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Photoshop\60.0\
I was just asking to verify that they were correct.
Windows can get a bit wonky with executable files that have the same name. When you manually try to direct a file to open in a program other than the one it already has set up, if they have the same name, it will just go for the original anyway. I don't really know of a way to force it to work. However, you can set this up in Bridge and from my experience it is entirely dependable. But the Bridge File Type Associations have no control over Windows Explorer.
Have you tried double-clicking the Tiff files in Bridge and have them open in the 32-bit version of Photoshop?