Once you have installed your keys.jlm file, you can:

When you add new keys, make sure that each key line is on a single line. A line break would invalidate the key. Note also that each key is implicitly connected to the preceding LICENSE line. You should not copy key lines without their respective LICENSE line, nor remove LICENSE lines or move key lines under a different LICENSE line, otherwise the key becomes invalid.

You must restart your application(s) for the changes to take effect.