Log in
Create Release (green link towards bottom left of page; must be logged in)
Create milestone - name it something like 1.5.7
In the milestone summary add Downloads upwards from release readme.
Select today's date.
In Release Notes add Downloads upwards (again).
In changelog, the new features and bug fixes only (no downloads or final summary line)
Click on Create Release.
From main project > Overview, make an announcement (button bottom right)
Make previous release Inactive (open it, click edit button on Active status, and disable)
If making a new series, make the series an active development series not the previous series. You should see it at the top of the full history graph if successful.