If you lost your USB drive or the files are corrupted, the best place for a is a community forum like the Reddit r/lasercutting community or Maker Forums . These communities often maintain stickied posts with Google Drive or Dropbox links to clean versions of the software (often LaserDRW 3.xx or 4.xx).
A: Likely counterfeit CH340 chip or unsupported baud rate. Try 9600, 57600, or 115200. Some clones require 230400. lihuiyu studio labs laser software download