It appears the functionality of the free versions of this invaluable software are being progressively diminished, leaving frequent users with only a very expensive alternative to achieve the same results that have been provided free for years. I assumed the later model versions probably would not work with my Sketchup 2017, so I tried downloading and importing the Collada version but unfortunately that didn't work either.

When downloading the item in my browser I was offered 4 options: Sketchup 2019, 2020, 0r 2021, or something called 'Collada'.

after payment of US$299/CA$375 to Trimble. I was able to download the item, but when I tried to import it I received a message saying it had been created in a later version of Sketchup than mine (2017) and that to complete the procedure I would have to upgrade to the current version - i.e. Reportedly it involves logging into 33 with an up to date browser using Trimble id and password, and downloading the desired warehouse item then importing the item into your Sketchup 2017 model. Downloading 3D warehouse items into a Sketchup 2017 model no longer works, but apparently a workaround exists.

3d warehouse sketchup