That's why I wanted to check; the interface is different
The easiest way is going to be creating a custom report on the Reports tab. In the blue Filters link uncheck "Filter on Active Player" and then you'll see data on all players. Add the stats you want and then you'll see averages from the field. That will include your data though so you'll want to use a filter expression like this (with your screen name subbed in) to exclude yourself:
holdem_hand_player_statistics.id_hand in (SELECT hhps.id_hand from holdem_hand_player_statistics hhps, player p where hhps.id_player = p.id_player and p.player_name = 'Your Screen Name Here')
Note that you do need those single quotes around your name.
Also, PT3 will be reaching end of life at the end of July. After that point there will be no more PT3 support and no more PT3 updates and the discount for upgrading to PT4 as a PT3 user may end. So now might be a good time for you to consider upgrading.