Hello WRW1955 and welcome to the forum. Why are you still so depressed, good question and if I was like one of those TV shrinks I'd ask you a couple of questions and have you all fixed up in no time(plus I'd be rich LOL).
Unfortunately depression can strike us whether we shouldn't have a care in the world or not. I have bipolar as well and I struggled for a long time with the depression side of it, long after the major manic episodes had ended.
One thing to do is get a very complete physical. I can almost guarantee that even if you have had a recent physical that your doctor didn't ck for a lot of things that can contribute to/or make depression worse. Problems with any number of glands(thyroid, adrenal etc), lack of the bodies ability to properly digest a variety of vitamins and many physical illnesses can cause increased depression. Wikipedia has a not bad primer on it.
http://en.wikipedia.org/wiki/Depression_(differential_diagnoses)
As we age we get struck with more and more of these problems and for some reason they are often not linked to increased depression.
You may also be taking a medication that has worked faithful for years and has suddenly stopped working for reasons unknown. They even have a name for it now, SSRI poop out (seriously and it's not limited to SSRI's) The Mayo clinic has article on why depression may worsen and even they refer to medications quitting working as poop out.
http://www.mayoclinic.org/diseases-conditions/depression/expert-answers/antidepressants/faq-20057938 of course the medical establishment has a correct name for this type of occurance (tachyphylaxis), but I can't pronounce that. More studies are showing that this poop out effect is happening more frequently than realized.
Even something like sleep apenea can cause depression. Plus I haven't started on exercise, diet or sleep habits, all of which may affect our depression. I can't speak for anyone else, but I find that as I get older it's harder to exercise, sleep well and eat properly, not that I was ever an expert on any of those things LOL. Good luck with your job hunting and keeping your car running. Take Care. paul m