If LightBurn rejects a legitimate key after a reinstall, record the exact error, installed version and operating system before changing anything else. Verify the key privately against your purchase record, then follow the matching official troubleshooting path. Do not reset the laser controller or alter production files to solve a licensing message.
A September 11 LightBurn support discussion describes a reinstall after a computer problem followed by an invalid-key message. The important distinction is between a key you possess but cannot activate and a key you cannot find. Those situations require different evidence.
Preserve a usable incident record
Create a short workstation note containing the exact message as text, the version installed, when the reinstall happened and where the software installer came from. Keep the full key and purchase evidence in a private support exchange or your approved records, never in a public forum screenshot.
For example, an operator may report only “the license stopped working.” That phrase could conceal an invalid-key message, a server-connection failure or an activation-limit message. Buying a second license or reinstalling repeatedly before identifying the message can leave the actual problem unresolved.
The official LightBurn license troubleshooting guide separates these cases. Use the current instructions for the exact error rather than applying a remedy copied from an unrelated discussion.
Match the message to the next check
| What the workstation reports | Useful next evidence | Keep separate |
|---|---|---|
| Invalid key | Original legitimate purchase record and exact entered value, checked privately | USB device discovery |
| Cannot connect to the server | Exact connection message and permitted network environment | Material settings |
| Activation limit | Current authorized machine usage and official license-management guidance | Assumed universal seat allowances |
| Expired or version-related message | Installed version and entitlement details from the purchase | Whether the laser itself still powers on |
Do not share another operator's key as a temporary workaround. If official instructions do not resolve the problem, send the incident record through LightBurn's official support route or the appropriate original vendor. Reseller purchases can have different record-recovery paths, so identify how your legitimate license was acquired.
If the key itself is absent, first recover the LightBurn purchase and license record. That recovery task should not be confused with repeatedly submitting an existing key that produces a specific error.
Restore the X1S Pro job separately
The TYVOK X1S Pro listing describes an 800 × 2000 mm diode workflow and names LightBurn among its software options. Software compatibility messaging does not establish that your purchase included a license or that a particular key covers every installed version.
Once licensing is resolved, confirm the intended device profile and recover the approved job files through your normal workstation procedure. License activation alone does not verify machine connection, origin, layers or output settings. If the reinstall also changed the application version, compare the actual travel order after a LightBurn update before releasing a production run.
Buyer questions
Will reconnecting the USB cable fix an invalid license key?
A key-validation problem and controller communication are separate. Address the exact licensing message first, then test the device connection once the application is usable.
Can I post a screenshot so someone checks my key?
Do not post the full key publicly. Share the error text without sensitive values, and provide purchase details only through the official private support or vendor channel that needs them.