I just got through installing B&O's Transmitter 1 software update. The release date looks to be Jan 15 2018. Version number 1.1.4.5310 for Transmitter 1. It includes updates for the other wireless speakers and Receiver 1.
I'm posting this here as B&O doesn't notify Transmitter 1 owners of new updates. I have no idea of what changes were made as it did not include a change log. Software is available on the B&O website support page for the Transmitter 1.