[575] I have an older CNC (2018) which has been working fine. The Windows 7 PC crashed and I am trying to get operational again using a windows 10 machine. I will have to buy a new license for the M

If you already have a Mach3 license, you don't need to purchase another one. The license is connected to you rather than the computer. Mach4 is licensed to the computer, but you are able to have multiple computers for each license, and can be switched from one computer to another. If you purchased the license from me, you can call (make sure to leave a voicemail), or email to get a re-issued license.