Dual mode doesn't look like to the description

[darwin]

Confirmed, I didn’t find a way how to implement this under El Capitan.

Other shortcomings of El Capitan version are listed here (as you probably noticed already):

TotalFinder status under OS X 10.11 (El Capitan)

El Capitan GM update: TotalFinder 1.7.9 has support for OS X 10.11 (El Capitan) (10.11.1-15B30a), but due to System Integrity Protection it won’t launch without a system tweak. Read full details here. You can report bugs/issues here in the forum post. Thank you for your feedback.