ReadMe:

These two variants of ScanPack are built from a common codebase, adapted from the standard 32-bit ScanPack.
The x86 version is for a 32-bit environment, but will run on a 64-bit machine with the usual Windows support.
The x64 version is for a 64-bit environment.  These are beta releases, best avoided for now, unless you need
the 64-bit support.  You should use the x86 version to replace the standard 32-bit ScanPack only if it must
coexist with the x64 version on the same computer.

Installation:

First deinstall all previous versions of ScanPack (and ScanPack_SDK, if you have that).
If you are installing both x86 and x64, the order of installation does not matter.