Electrix Tweaker Editor Reference - Manual (Page 14)

3. Control Settings
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Delete
Press this button to delete the currently selected preset. You’ll be
asked for confirmation before you commit this change! This will
delete the preset file from your hard drive. There is no undo.
Reset to Defaults
Press this button to send the TWEAKER a message to revert to the
factory default settings. You’ll be asked for confirmation before you
commit this change! The default settings are documented in the
included TWEAKER MIDI Map document.