Hi,
I just downloaded the latest r7183 build and the simulator is not there.
I heard long back that the simulator is merged to the product branch, why it is missing and how to get that?
On Ubunti I noticed a new package installed, libngspice-kicad.
In new packages I see ngspice-kicad, tclspice-kicad and doc packages.
I expect that the ngspice-kicad, at least, is needed.
That means simulator is available only in the linux nightly?
No idea, but I have found that libngspice-kicad seems to clash with ngspice-kicad
The spice integration isn’t going to be available in the windows nightlies for a while. That dev is busy. 
Sujith,
Apparently the windows nightly that will be appearing tonight will have the spice simulator built in to it.
Enjoy! If you run in to any bugs please report them at https://bugs.launchpad.net/kicad
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