Thank you for reporting @RalphU. We are aware of this issue. To resolve, click the ‘Help’ → ‘Check for Updates’. That should pull the required resources and display the Web Tools option.
Please let us know how you progress. 
Bonjour j’ai le meme problème et quand je clic sur chercher des mise a jour cela ne change rien
I am not sure if I restarted Lightburn, but it shows up on the right side of Laser Tools.
Did you follow @Rick ‘s instructions?
Yes, I followed those instructions but nothing changed. However, after re-starting Lightburn two more times, it finally appeared.