I tried to open the same folder in a separate window, in order to work on a separate part of the project that is already running in the first window. But the folder-open command just brings up the first window instead. Is this supported some other way?
I also strugggle to open the “Variable” window / Variable Explorer / Inline-Data Viewer in VScode.
Accidentally I closed this window and now I wonder how to display it again.
What I am looking for is Variable Explorer as it is well known from Spyder, Octave, Atom, etc.
If I work on Python code inside VScode it works fine, but if the Julia-Extention is loaded, VScode refuses to open the Variable Explorer window. 
Try the Julia: Focus on Workspace View command.