I cant move groups or dynamic sets


Hi folks.I have a problem about tp 6 for max 2018.When i create a few groups in master system or create dynamic sets in master dynamics , i cant drag and drop a group(or dynamic set) in another one.i am a newbee in tp.i search on internet about this problem but i cant find any solutions.i can not find any way to moving a group in another group which group treeview seems like the image which i loaded this post.i see guys in tutorials drag and drop for moving groups buts they all seems different group treeviews(i think its older version.there are some “+” icon front the name of group.in my tp UI there are colours in front of the group name like image below).any advise?..sorry for my english