OpenEMM Support

hmmm ok, but how could i "create a new target group containing all addresses from list A and B"
when i try to set up a new group, i got a choice of filtering rules like change_date, creation_date and so... but nothing obvious allowing me to select users from a particular list?

i´m currently trying ...

Hi all,
i got two lists on my openemm: List A and list B.
i want all the addresses from list A and list B into a new list C, how do i achieve that?

I tried to export both lists, merge them and import into a new list, but it obviously doesn´t work, since all addresses already stand either in list A ...