I just updated to public Yosemite beta 3 and when the Finder and TotalFinder launched, the sidebar in the right hand window was now on the left side of the file list and not the right side of the tab. Did Apple cross thing up? Is this a bug or feature? 
This will be fixed in next upcoming TotalFinder version 1.6.10. Iām about to release it on beta channel. Tomorrow or by the end of the week.