projects need to be able to select the latest file for the download button, instead of the button downloading a random version because you deleted a previous version or uploaded a readme file in the wrong order
This feature is already available. Setting the default download can be accomplished through the File Manager.
That should then set the default download as the file you selected. There may be up to a 5 minute delay before links are updated.
Chris Tsai, SourceForge.net Support