Adding license key in offline mode is not simple as v6, v7, v8 where there is insert key option
In v9, you have to disconnect your internet connection and select activate trial version, a dialog box wll appear, just click OK and there is Browse Command.
In v11, you can insert license key from Run... (press Windows key + R) then type:
"valid kaspersky path" addkey "valid key path"
"C:\Program Files\kaspersky\avp.com" addkey "D:\12345-67890-abcde.key"
Need a correction, please