If you have the dongle but lost the software, you are safe. If you have neither, do not waste time downloading the software—you cannot run it.

: It is recommended to contact your original machine supplier or Leetro Automation directly for the original driver and software files.

: There's an active community of users who share their designs, tips, and troubleshooting advice, which can be invaluable for both beginners and experienced users.

: Assign different colors to layers to define the order of operations, such as engraving before cutting. VLS Desktop User Guide - Universal Laser Systems

If you lost the little red or blue USB stick that came with your laser cutter, the software will show an error: "Dongle not found" or "No key." You cannot bypass this with a crack; the communication protocol requires the dongle’s specific chip ID.