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!