In my 'wincmd.ini' file, I have following entries.
[Left]
path=D:\downloads\
ShowAllDetails=2
[Right]
path=D:\downloads\
ShowAllDetails=1
Above entries makes sure that the left Windows of TC7pb to be displayed in Directory Tree View mode, while right windows is set to display in All File Details mode.
Prior to TC7pb's (for example TC6.55a), when TC is started with above settings, TC has left windows in OPENED Dir Tree View mode.
However, in TC7pb2, Dir Tree is closed when TC7pb2 is started.
Here are screenshots.
In TC6.55a
Image: http://img225.imageshack.us/img225/2820/tc655atreeba3.jpg
In TC7pb2
Image: http://img225.imageshack.us/img225/9800/tc7pb2treedefud3.jpg
What I think is more convinient
Image: http://img182.imageshack.us/img182/7600/tc7pb2treeopncs1.jpg
I hope there's an option to change default Dir Tree View to be opened as third screenshot. It would make more sense to old-fashioned user like me.

Thanks.
Sang