I HAVE A CRAFTSMAN 41A3516-2 GARAGE DOOR OPENER. WHILE TRYING TO "SYNC" MY NEW SKYLINK UNIVERSAL REMOTE (HAVE HAD 4 OVER QUITE A FEW YEARS) MY OPENER "SYNCED" TO THE KEY FOR MY 2008 AVENGER. I HAVE TRIED ERASING THE MEMORY FROM WHAT I COULD FIND ONLINE - NOTHING IS WORKING - DOES ANYONE HAVE A USER MANUAL OR ANY ADVISE??? RIGHT NOW EVERYBODY'S KEYS ARE OPENING THE DOOR AND ANY REMOTE CAN AS WELL!!