Hello, just install SketchUp Make 2017, and everyday he say that i have only 20 days to upgrade to pro. Is it not a free anymore?
you downloaded the install for SketchUp 2017 Pro, which starts off as a free trial then locks you out at the end of the trial period.
Go to the SketchUp Downloads Page and choose SketchUp Make 2017. Uninstall the previous install and install this.
SketchUp Make, too, starts with a 30-day SketchUp Pro trial. After it expires, it should continue as Make.