I have just successfully changed my primary email address, having been searching these forums for 2 days for a solution. I was unable to make the change from my iPad but going through the same process on the PC this morning, it worked. Got to email addresses, clicked on 'update', ticked the box to 'make this the primary email' and then clicked the save changes button. This time it worked. Don't know if it was a PC/Mac thing or if something has been done, but it worked.
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