You’re right, it is a bit different. Assuming you have the Dropbox app installed, here are the steps.
- Click on the little cloud in the upper right corner of SketchUp Viewer 4
- Select on “Files on Device”
- You should see, under “Locations” on the left, an entry for Dropbox if not, you might see a “switch” to activate access to Dropbox.
Let me know if that helps.
-guz