We have noted on the Product Downloads page, that under the current release, ther eis a reference to "SharePoint 2013 CU Version July 2015", but no indication of why this is included here. When my associate asked support if this was indicating that the CU is a prerequisit for the installation of the 3.1.5 release, he was told that this was not the case. If this is so, why is this reference included on the page?
We have updated our product downloads page to reflect the correct information which is "Tested on SharePoint 2013 CU Version February 2016"
Thanks for pointing that out!