TotalFinder tab behaviour - doesn't open new tab from finder file list

Installed Yosemite 10.10.1 a few days ago and updated to TotalFinder 1.6.17. All fine except -
Previously when I clicked a folder in the file list a new tab would open in the tab bar beside the existing one (as in Chrome and other browsers):

Clicking a folder in the side bar replaced it in the same tab that was open. To get it in a new tab beside the old one, one had to drag the folder up to the tab bar.

Now, this is what happens when a folder is clicked either in the side bar or in the file list window. No combination of Finder preferences and TotalFinder preferences seems to change this? Any chance we could have the previous behaviour back, that is, clicking a folder in the file list window opens it in a new tab beside the existing one (as in the screenshot)?