While it’s certainly an option to make the feedrate a setting, the tool will not move your laser anywhere near the bed unless you specifically tell it to do so using the config file. The collision seen by @ViperZ is most likely caused by other incorrect settings in LightBurn.
I highly recommend following the guide from @Skreelink (Full Lightburn Control Guide) to set up LightBurn correctly, and then try to use this software.