I recently upgraded to the free version of uV4, and was having problems with one of my boards, so I decided to make a new project and try to isolate the problem.
When I go to Project->Select Device For Target, the resulting device list is empty. The tools.ini file doesn't have an entry for the device database, and I'm not sure if uV4 requires it.
Ah, OK. The Nordic stuff is uV4, the tools are now (just) at uV5 -- so the Nordic examples aren't up to date. I'll bug them, or customize.
Thanks everyone.