Because Leetro does not host a public, user-friendly download portal on their main website, users often rely on trusted third-party repositories or manufacturer support pages.
This is the safest and most recommended method. If you bought a laser cutter from a reseller (e.g., generic eBay/Alibaba sellers, or specific brands like RedSail or Rabbit Laser), check their support page. They often host a "Software" folder containing the exact version compatible with your machine's control card.
Do not download from: Softonic, CNET Download.com, or any site that prompts you to install a "Download Manager" – these almost always bundle adware.