Upgrading older software like "Knitware Sweaters" to work on modern versions of Windows can be challenging, depending on several factors. A software developer ("smartypants" or "wizard") would need access to the original source code to modify it for compatibility with newer systems, which could involve updating dependencies, code structures, and user interfaces. If this software is critical, you could also try running it in compatibility mode or using emulation software like a virtual machine with an older version of Windows. However, without access to the original software source code, creating a fully compatible new version would be difficult.