Will AYS run on 64-bit versions of Windows?

There is a single program installer for both 32-bit and 64-bit operating systems. When installing AYS on a 32-bit operating system, the program installs by default into the C:\Program Files\At Your Service folder. When installing AYS on a 64-bit operating system, the program installs by default into the C:\Program Files (x86)\At Your Service folder.

Is AYS compatible with 64-bit versions of Microsoft Office?
How do I download and install the latest service pack?