Kmail Composer address completion ignores Edit Recent Address deletion

Using KMail 4.12.5 on Mageia-4, I've come across a problem with Address 
Completion, which continues to show an old address that has been deleted 
(and no longer appears) in Edit Recent Addresses.

  (Tried logout/login, and even restart, to no avail.)
  
Anyone else come across this, please?  

(If not, will raise bug report.)

-- 
/\/\aurice 
	(Retired in Surrey, UK)     Registered Linux User #487649
		 

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