HELP for new user

New to Lightburn and using a Laser, on home page on the right side of the page here its tell about your machine has gone away I to add the Fire button but everything is gone what do I need to do to ger it back

You can always reset the Window Layout, back to the default. Pull down the ‘Window’ menu, and you will see you can enable windows individually or reset the entire look.

Here is a dated but important video about rearranging your workspace.