My new software won't recognise my Ruida controller

Assuming the requisite USB driver is in place and Windows recognizes the controller when you plug it in, then selecting that port in LightBurn should do the trick.

The Troubleshooting process may help:

If not, tell us where it falls off the rails.

Based on past problems, however, using the Ruida’s Ethernet connection will avoid a tremendous pile o’ hassle:

The setup doc gives the process:

More details: