I have FTM2012 and it let me upgrade.
What to though? The only release at the moment is FTM 2014.1, which is/was a free upgrade to all existing FTM users. The only FTM program that will sync with Ancestry after this month is FTM 2017, which isn't released yet.
I agree, I don't think you've upgraded to FTM17 as it says "If you
purchased a Software MacKiev edition (
FTM 2014.1 or Mac 3.1, both introduced on March 1, 2016) and have signed up for the FTM mailing list, you will receive a free downloadable upgrade by email." So you only get a free upgrade to the new software if you've bought FTM2014.