Today, 64-bit processors have become the standard for systems ranging from the most scalable servers to desktop PCs. The way to take full advantage of these systems is with 64-bit editions of Microsoft Windows products.
The 64-bit systems offer direct access to more virtual and physical memory than 32-bit systems and process more data per clock cycle, enabling more scalable, higher performing computing solutions. There are two 64-bit Windows platforms: x64-based and Itanium-based.
x64 solutions are the direct descendants of x86 32-bit products, and are the natural choice for most server application deployments—small or large. Itanium-based systems offer alternative system designs and a processor architecture best suited to extremely large database and custom application solutions.
64 bit is a way of manipulating data and if something is currently 16 bit there is no way for you to upgrade them to 64. That is the job of the author of the product. You will have to contact them.
Frenchie