We were in such a hurry to get this release out we mis-typed 5652 instead of 5651.
If you read the release notes for the RM Mixer the correct version is listed there.
We are working to correct the problem so that the download page in the my.presonus.com account reflects the correct version number to avoid any further confusion.
Just to be clear, there is no 5652 release for the RM32Ai / RM16Ai, there is a 5651 release which is the most recent.
We've reposted the properly named titled version of the release notes here and we should have the systems updated soon.
We apologize for any confusion this may have caused.