Quick update; The lastest Mach3 download from Artsoft, v3.043.062, posted on their site contains the fix for Win 10 64bit 1803 (and beyond)! > http://www.machsupport.com/software/downloads-updates

Quote Originally Posted by A_Camera View Post
Congratulations and thank you! ...
You are welcome!

Quote Originally Posted by A_Camera View Post
Maybe there will be an 1804 soon, if more than Mach3 is affected, which will fix the issue.
Future Microsoft updates are very unlikely to address the root-cause, therefore either the patch or the updated Mach3 download is needed for builds including/beyond 1803.

Happy CNCing everyone!

-Nathan & CNCRP team