Thanks ginglish1 - I'm now fixed after calling their very helpful help line. I had naively assumed that they would prefer/respond to email! The answer(s) were to be found at
http://ancestry.custhelp.com/app/answers/detail/a_id/5409
I installed manually successfully
http://ancestry.custhelp.com/app/answers/detail/a_id/5409
I installed manually successfully