First update of 2015!
Actually I've been working on this since 2014 :P
This update introduce a new and more complex last active tab function. Nope theres no new settings to play with as its all in the code. The old last active tab function is a naive one that stores just one last active tab. The new version has a queue which stores the last active tab and the active tab before it and etc, its like having more undo steps compared to only one undo step in the old version.
I think this should be the correct way to do it, took me long to realise, wasn't thinking deep enough. I also wasn't using that option at all on my PC, I prefer to go back to the left tab.