Given the numerous threads I’ve seen with people who try Pro 2018, then decide to go with Make and try to use the 2018 version files they created during the trial, a small change in what happens when the Pro trial ends might be in order.
Instead having zero function, allow only the following
- File --> Open (through menu or double click on file)
- File --> Save As
Thus creating the ability to use the files that were created without involving either SketchUp Free or the 3D Warehouse.
Also, preserve this in all future Pro versions.