Open Single Lister

Hi, on my main desktop computer, I have this set so that only one lister ever opens, if I open a new folder it simply opens in the existing lister. I'm trying to install this program on my laptop, and multiple listers are opening. I can't remember what setting I used to stop the multiple lister opening behavior. Can you please help?

See Always re-use a single window instead of opening new windows .

I have done that, but if you will look at the attached screen capture, will see that I'm still getting two listers (s. cap only shows one setting but I've done both):

Ignore that last reply, it was the new tab setting which was the third screen capture which fixed it. Thank you for your help.