Not sure if this should be a Feature Request or Bug Report. Anyway, I believe in 1.3 if you locked a tab and then double-clicked a folder in that tab, that folder would open in the same tab. In 1.4 it is opening the folder in a new tab. I liked the way it worked in 1.3 better.
Please correct this functionality or provide a setting that we could switch the way it behaves. Thanks.