BTW, you only switch between 32-bit and 64-bit mode if you really have
different file versions for 32-bit and 64-bit Windows.

If your application is 32-bit and you install 32-bit files on x86 or x64
systems then you should never touch "Set x64 Mode...".

The installer handles this automatically for you and always installs into
the correct System32 folder and writes to the correct 32-bit registry branch
on 64-bit Windows systems. You only use x64-bit to access 64-bit Windows
resources for native 64-bit applications or components.

Friedrich