I just installed the 64-bit drivers for the Anywhere USB-2. I was looking in the Advanced folder where all of the api dlls and documentation are. However, the API DLL included with the 64-bit driver appears to be only 32-bit.
It worked, the only caveat is that this dll was not statically linked to the VS 2013 CRT. But that’s OK, I was able to install the redistributable and got it working.