CONNECT Edition:
The OpenCities Map CONNECT Edition ReadMe can be found in the on-line product documentation. Alternatively, you can access a local HTML copy of the ReadMe in your installation folder: ... /Documentation/htm/Readme.html.
You can access this HTML content by unchecking Settings > User > Preferences > Help Settings > Use Online Help
Bentley Map V8i:
Bentley Map V8i ReadMe files are installed locally. Look for readme_Map*.chm in your installation folder which is typically .../program files (x86)/Bentley/