ITunes 12.4.2.4 TONES folder missing
I updated to ITunes 12.4.2.4 and updated the phone's (6) software. Then, most of the music synchronised across to the phone (in-between crashes). All of my ringtones (3 - made via Itunes) vanished. Can't see them on the phone in sounds and settings etc and can't see them in itunes. Managed to locate one of them that I'd saved as last time adding the file after a phone s/ware up to date was just such an absolute PITA. But, even though I can make it an ACC file, as soon as I rename it to a .4r file (which all the guides tell us to do ), Itunes gives it the exclamation mark ⚠ and says that it can't find the source file. I can make a copy of the source file...I just end up with lots of instances of the same file which won't transfer over to the "TONES" folder of the phone - there is no corresponding folder in Itunes named "TONES", there used to be in but in this latest itunes upgrade - it simply isn't there in the folder list. Any help please. I'm using ITUNES version 12.4.2.4, Windows 7 and an Iphone 6. The ringtone is a seven second tune in ACC format.
Many thanks in advance.
iPhone 6, iOS 9.2