Sketchup Make license

Dear all, I am new in this forum. I have been using Sketchup make 2017 in a unversity class. Now my students get the message after installation
Licensed to: Sketchup Make 2017 user, ProTrial
Expires November 19, 2021.

Does that mean that Make is no longer free or does it mean that we use a pro version until Nov. 19 and are then downgraded to Make 2017?

the latter.