TripleA 1.7.0.1 comes with triplea 1.6.1.5 inside of it (for the purpose of opening up 1.6.1.4 maps).
So if you run TripleA 1.7.0.1, and then click “load game” and load your savegame with 1.7, it will then open it with a new process of 1.6.1.5, and you will not see any message about being out of date (instead you will see a message saying you are using this ‘new’ feature to run an old savegame).
In any case, there are only a couple very small updates in 1.6.1.5, so you can ignore both messages.
Run it with 1.7.0.1, or run it with 1.6.1.4, both are OK.