Skyshop nodes in Shaderforge v1.25 --unity 5

I saw the thread about skyshop and shaderforge 1.16, but I was still capable of building shaders for skyshop.

Now that shaderforge is v1.25, the skyshop nodes are visible but inaccessible. Did support for skyshop stop completely?

If so, how can I install 1.16 of shaderforge ( a known working version with skyshop nodes). I prefer Skyshop's IBL than Unity 5 IBL.