How to choose the main address of contacts with multiple addresses?

I use distribution lists and some contacts have more than only one mail address.
eM Client seems to randomly pick one of them and to put it in the distribution list.

How do I make one of the addresses the main one?
How do I choose wich one the distribution list should use?

As far as I know, if there are more than one, it always chooses the first one in the list at the time you add it to the DL.

If that isn’t convenient for you, you can add the details manually.