I’ve purchased and installed Pro as well as the user-specific and revisions add on. In my settings I’ve gone to the ‘File Revisions’ tab and ‘Don’t Keep Log of Old Files?’ is unticked. However, when a file is uploaded there is no green revisions icon like in your screenshots and there is no ‘Revisions file’ area in the box on the left-hand side like in your screenshots.
It works in the backend of the site but I’d like it to work in the front end too. If a teacher uploads a file and shares it with a student, I want the student to be able to revise it rather than downloading it, editing it and then re-uploading it again.