I just installed the demo version 11 (replaced my version 10). I have two toolbar buttons to clean up the tree on the left and right panels.
Go EXPANDTREE OPENINLEFT /MyComputer
Go EXPANDTREE OPENINRIGHT /MyComputer
These have always worked as intended in version 10. The left panel function still works as intended in version 11. However, when the right tree turn back on, it simply returns to the expansion and focus that it was on before the command sequence. I also tried the Set TREEROOT=reset command. It works properly on the left panel, but the right panel just returns to the expansion and focus that it was on before the command sequence.