v4 has the search at the homepage

http://sketchucation.com/forums/download/file.php?id=143008&mode=view/rokbox.jpg

@timdeandesign said:

Extensions is missing from the Preferences menu in SU 2017. How do we load them?
Open - menu Window > Extension Manager > Red button bottom-left 'Install Extension'...
After that it's much like v2016...

Get the newest version of the SketchUcation Toolset - v3.0.4
Specifically updated to resolve a weird glitch that a few users reported in v2017 [where the dialog comes out fixed at 37px high] - most users didn't see this, but that update now resolves things for the few...