What is convert to bis

Was using Lightburn trial it has run out do I need to wait till I get my laser to put my key code in there to get my Lightburn going in

If you have a key, you can enter that and start using LightBurn when you are ready. You should be able to just run as you did in the trial. But if required, I would suggest you set up manual, and select the device profile as per the Thunder Instructions or following our documentation: Adding a Laser - LightBurn Software Documentation