This thread is SIX years old. 😮
The RB file which is linked in the first post would probably work if it were downloaded then manually installed into your SketchUp Plugins folder.
If you have an Ad-Blocker set for SCF's pages, it is against the ToS you agreed to, and downloading/images etc may then get blocked - disable it foe SCF - the revenue from its discreet relevant banner-ads helps to pay for this site's very existence !
However, there are now many superior tools available - e.g. thomthom's Selection-Toys [his tools need his Lib too].
I suggest you search in the SketchUcation PluginStore...
Or the EW for suitable extensions...
The newer tools' RBZs are readily installed using the native-installer, so no need to even mess on finding your Plugins folder!