We're planning to push a small update to the Steam version tomorrow night (February 16th) around 11pm EST. This will (hopefully) fix the 5.1 audio issues, and some other small bugs.
As previously mentioned, it has come to our attention that some users are experiencing deleted save files. We have not been able to re-create the issue ourselves, and it appears to affect a very small number of users.
Just to be safe, please take one of the following precautions if you are able:
1. Use the "File Upload" feature located on the title screen. This will upload a snapshot of your current file to the server, which can be retrieved later from the same device or another device:
2. Make a manual backup of the actual save file located at %USERNAME%/AppData/Roaming/dungeon/
Thanks!