I can change it in the CP and it take effect. It is a new feature in 7.5 that you be able to set the sorting for each forum. If your settings dont saved take a look at the ubbt_FORUMS table and check for the 2 new fields for the sorting order. Maybe your setup miss it. Do you run the installer while upgrading the forum? It insert 2 needed fields in the table.

my board: http://www.dragonclan-forum.de
my hobby: http://www.biker-reise.de
Ich kann bei Fragen zu UBBthreads in Deutsch weiterhelfen oder es zumindest versuchen