How do i change default usergroup in vB 3.7?
 

When i remove someone from mod duties in the forum manager, they automatically go from the moderator usergroup to the default usergroup.

My default usergroup is not where i want them to go, i use my default group for brand new members and then i promote them to full member using promotions.
These users meet the requirements to be full members, but when they are dropped from the mod team they have to be manually moved into the regular member group.

Is there a way to change the default usergroup in order for this process to be automatic?

When the promotions are run, they will be moved to the correct usergroup. As the promotion script is run as a scheduled task, it will only run at certain intervals.