I think in the original DOS game you have to make a "save" diskette to back up your characters before you entered the dungeon. There doesn't seem to be a way to do that in this version. The only way I have found to do something similar is to copy the two files in the SaveGames directory to somewhere else on your computer. I do that before I enter the dungeon, and then if I don't like what happened, I restore them to the SaveGames directory. On my Windows computer, this directory is here: C:\Users\sdsom\AppData\Local\murphy\Saved\SaveGames (where sdsom is my Windows user name).