The software includes this message to inform them that their copy is not legitimate, and it’s necessary for us to do this because some retails are selling pirated copies of LightBurn. We’re not trying to harm the customer - we’re trying to harm those sellers. If I wanted to, the software could easily do things like wipe your hard drive, overwrite your controller settings with garbage data, or worse, but I chose to do this as way of letting people know in clear terms what happened.
LightBurn started very small, and is growing almost faster than we can keep up with, so your suggestion of a valid vendor list is something we’re likely going to have, but for the moment, we don’t.
On the other hand, if you do a Google search for LightBurn, and find that nearly everyone is selling it for $40 and $80, and some Turkish vendor on AliExpress is selling it for $5, along with copies of SolidWorks, Illustrator, etc, all for $10, and you purchase from them, I don’t have much sympathy - If a deal seems too good to be true, it is.
For the record, I did ask them, and the user said that copy was an add-on for a machine they purchased, and they paid $4 for it. In every case where a user has come to us and said they bought from a fake seller and didn’t realize until they saw the above message, we’ve given them whatever they paid as a discount toward a proper license.
In a number of pirate message boards, I’ve seen people complain that the cracked version is ruining their materials and they can’t trust the crack to do any real work, so it’s having precisely the desired effect.