32 bit and 64 bit

Both 32-bit and 64-bit targets are supported. In general, the x86 setup should be used for 32-bit machines, and the x64 setup for 64-bit machines. This is the only way that the Explorer functionality will work because the Property Handler and Context Menu Handler run in the Explorer process, and so need to have the same bitness.

For development, however, it is useful to test 32-bit configurations in a 64-bit development environment. As long as a 32-bit build of TestDriver.exe is used with a 32-bit installation, this should work fine.