Where is the traditional 'HELP' data in NU?

When I look for help in NU 16, just installed, all I get is feature overviews. I already know all that, or I wouldn't have installed the program. Usually, 'help' is a searchable database of useful information about how a program works, how to use options, what happens when an option is turned on or off, for example. I wanted to know what 'clear run history' means, but can't find any information. I even got through to chat with someone, who only sent me links to 'features'. 

So, where is, or is there any, traditional 'HELP' data for NU, please?