Segment status mapping goes back to default mode

Hi fellow translators!

Under

File > Options > File types > XLIFF > Segment status mapping

my client would like to see the "Studio status" as follows: "Translated = needs review adaptation". Only then will I be able to upload the file to their server.

However, every time after I have clicked OK and reopen the window, it shows the default setting  "Signed-off = needs review adaptation" again.

Has anyone got a clue how to stop Studio 2015 doing this?

Thanks in advance,

Stefan Wilms, automotive translations & copywriting.