I would like to release a license, but my computer burned. Hard drive is OK. Is there some way to recover some file from crashed PC?
I can buy a new motherboard and theoretically boot this PC. But I am afraid that this would break licence.
It’s good that your hard drive is ok, then you at least have your project files.
You can rebuild your PC or buy a new one and use the old HD as external storage.
The license is not a problem, go here on the page to “license portal” and free/delete the broken computer. You can use LB on up to 3 computers at a time, so it’s easy to get started again.
On the new computer, you install LightBurn and use your license key for activation, then you can download the necessary LB libraries/data from the old HD. Theoretically, you can also start LB from the old HD, make a complete backup of LB with the built-in tool and use it afterwards on the new hard drive.
Thank you.
I have looked to my activations and I have only one activation from 3 active.
I have activated LightBurn on old notebook (used to send commands to LASER unit) and activated 2 times on the PC that gone. There was a problem that dual boot consumed 2 activations. I am not sure which activation is here listed. Looks like some activation, that was not used more than year disappear.
Do not worry about my data, I have additional backup on external USB drive. There are 2 groups of people
1, those who are doing backups
2, those who will do backups in future.
I hope that ambient temperature over 30 degs is not only killer of old PC but LASER diodes degrade over this temp.
That doesn’t always pan out either. 
I have worked around IT for over 40 years. The proper way to do a backup is to store it locally and also on a different device. Besides those you should have a copy off-site. You have effectively made 3 copies.
I did all, except uploading to Google, had a device failure, that actually took out two drives, so I lost both local backups. Bummer…
A couple of places stored off-site, one in Iron Mountain. Supposedly it could take a nuclear weapon detonation right above it and not affect the data … Nice to know that when we’re all pushing up daisies, that data is safe. 
You’re pretty much correct in your simple and short statement.
Most things have a higher degradation rate as you get an increase in temperature. A guy I used to talk to on the radio, in Brazil, advised me that solid state devices degrade quickly there. He blamed it on the ambient temperature and claimed they lasted no more than than about two years. Too hot, I’m sure the humidity doesn’t help either.
Most solid state devices have a limit on how hot the junction temperature can get. Never had to worry about it with tubes.
That was a black rumor joke about backup.
I have re-activated successfully LightBurn now. The problem of some software is, that after some years, activation is not possible. Even when you have full backup. I have found that it is possible to run old code on virtual machine. Even 16 bit old code works on 64 bit PC that has 32bit virtual. On my previous PC I had dual boot 32/64 OS, there are no drivers now, only virtual.