Mach3 is a popular software for CNC (Computer Numerical Control) machines, and I'm assuming you're looking for a specific version of the software.
Reach out to ArtSoft's support team directly and ask if they can provide you with the specific version of Mach3 you're looking for. They may be able to guide you on how to obtain it or offer an alternative solution. mach3 version 3.043.066
A very specific request!