http://www.rme-audio.de/forum/viewtopic.php?id=21006
 
Version 1.05 for Mac and PC solves these issues:
- MADIface USB would not show up to 128 input channels
- Volume of Listenback input is saved
- Loopback did not work on channel ADAT 7/8
Download:
http://www.rme-audio.de/download/totalmixfx_105_win.zip
http://www.rme-audio.de/download/totalmixfx_105_mac.zip
No installer. Exit TM FX, then copy the unpacked file to Windows\System32 or the Mac's application folder.