Capture 126.96.36.199798 released on April 1, 2015 supports Sync for RM Series Mixers.
Access the downloads here: Capture Download
or in your my.presonus.com account if you have an RM, StudioLive AI or StudioLive mixer registered to your account.
See here for information on setting up Capture Sync and using the Mix Scene feature when opening Capture projects in Studio One:
NOTE: Previous versions of Capture do not support Capture Sync with StudioLive RM mixers. Because of this, with projects created/saved with the previous release of Capture version 188.8.131.5235, there was no way for channel names to sync or have scenes saved with the session that would load when the Capture session is opened in Studio One.