The paper is no good if it was in a frig. It probably wouldn't even survive 20 years in a freezer, but if it was only in a refrigerator you can forget it. Any B&W developer should work, although it used to require a pinch of hypo to remove the mask I've heard some people get away without it. However that may have been with newer paper. I always used hypo so I don't know. And Ilford Rapid fix will work fine.