What happens to the license? Can I simply insert the .lic file into the newly installed Mach 3
Make a back-up copy of your Mach1Lic.dat (just in case).
If re-installing Mach3 (or updating) over the top of an existing installation your license file will be preserved.
If by any chance it is not then copy your Mach1Lic.dat into the Mach3 folder.
Tweakie.