Just wanted everyone to know that Sketchup 2018 is available only in a Pro ($700) version. There is no free desktop version. There is a free web version, however, it does not support extensions, so the TF Rubies are not available for it. So if you want to continue using the TF Rubies for designing timber frames with Sketchup, you'll need to remain on the 2017 version, or pony up the cash for the Pro version. CB.