Charmless Man
Striker
If you are in interested in the subject you will enjoy it. If you see it as a means to an end then you might resent it and the effort involved. That goes for professional qualifications as well.
However, if this is about repositioning for the future, then if you do a masters you might want to think about going the whole way and doing a doctorate or PhD. I did one in my 50s and wish I'd done it in my thirties. It opened loads of doors for me, you are never short of academic opportunities, and it gave me several years of self-employment before gradually easing off into retirement.
Just a thought, but I certainly didn't regret it, and I would imagine you wouldn't regret doing a masters.
The one thing I think about my doctorate is I wish I'd waited 5 or so years. Ended up doing it straight off the back of my undergrad with no break and it damn near killed me. I got it, but I f***ing hated it by the end
I think more mature people almost always fare better with post grad study.