I want to make the CNC machine work. However, the version of Lathe software in PC is not suitable for the firmware version which is in the CNC machine. The version of software is 5.5 and the version of firmware is 3.02.49

the Lab-Volt CNC Lathe 5500 B5 just have the port of 'serial port' and the operation system of the PC is windows 98.

there are two solutions:

1. upgrade firmware of CNC machine through transfer the firmware file by serial port.
2. download the lower version (Level 4) software into the PC

Does anyone who know how to transfer the file through serial port?
or
Does anyone have the Level 4 software of Lab-Volt Lathe?

Thank you

Yao