There has been a discussion on the Yahoo Group Mongenes about this subject - hope this link will work for you.
https://groups.yahoo.com/neo/groups/MonGenes/conversations/topics/7271?reverse=1
In short, no one single program has come out top and although the GED format is supposed to be transportable, some programs deal with it in different ways, according to the contributors.
The advice seems to be to download everything you might have stored on Ancestry before FTM is no longer supported. I would have thought your version of FTM should work independently, you just won't be able to transfer data as you can now.
Sorry I can't be of more help.