It is great to see some sorting capability in Shapr3d beta!
In 5.520.0.6133 the options of last modified date vs alphabetical is refreshing.
I would like to see last modified date differentiated from last opened date. Currently, the act of opening a project seems to change the last modified date to current date, so simply opening and closing a project bubbles it to the top of the stack.
To me, a change involves changing the content, i.e. a sketch, body, geometry, history step, visualization. Whereas, moving the viewpoint (or even opening the project) is not changing the content of the project.