There is no longer any need to purchase a Pineapple News registration key, because the program is now totally free, and does not expire.
Alas, I haven’t yet compiled a free BeOS version of the program. I may never get around to it, because I no longer own a computer capable of booting BeOS. So for the BeOS version, you can use this free key:
Name: Free User
If your BeOS version of the program has already expired, then open the file PineappleNews.ini with a text editor, which can be found in your preferences directory, and hand-edit the above values into the file.