Notes about the RNT file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The RNT file type is primarily associated with 'EdgeCAM' by Pathtrace Engineering Systems. .ONE files, along with .RNT and .TME, are Pathtrace's licensing files, used to update the
dongle based licensing sytem on a users PC for the EdgeCAM CAD/CAM programs. The .ONE extension has been iun use since about 1990, the other two were introduced in 2004. .RNT files and .TME files are for rental and timed licensing models.