To delete one key at a time
To remove a previously assigned key open the Flirc GUI app, and find the "erase" button in the lower left hand corner of the screen (highlighted in the screenshot below):
Click the "erase" button and the app will prompt you to press the button on your remote control that you want to unassign from Flirc:
If successful you will see the following screen:
To delete ALL keys from Flirc
To delete all user programmed keys from a Flirc device, go to the File menu then click clear configuration
A warning message will then show warning you that all saved keys will be removed:
Press OK to remove all keys.