@lotus222 said: "Tip: Is the Add License area grayed out and inaccessible? This means you have installed SketchUp Make instead of the SketchUp Pro trial. If having two versions of SketchUp on your computer might be causing problems, try uninstalling SketchUp and then installing only the version you need." To clarify, that message refers to having both Make and Pro installed for the same SketchUp version, e.g. 2016. It does not refer to having 2015 and 2016 both installed. Each 'year-version' of SketchUp installs completely independently of all the others, including the license file, and you can have multiples ones installed and running at the same time.