Re-skin creatures or replace other repeating text in room descriptions and notes - there is no Undo so be careful.Replace with in Notes and all Location Descriptions.
Export dumps the data for the current dungeon into the field below. Copy and paste into an email or a file to move to another computer. Paste into the field there and click Import to load it. Careful editing in this field is possible. Save with a name on the destination computer.
To manually save and use the dungeon outside this page, copy the text of the room contents table and notes field and paste into another file, and use the Download Image button on Chrome or the right click menu to save the image as a PNG. If you need to clear all cached data in your browser for some reason, please export if you'll want to use a dungeon in DunGen again or manually save of any dungeons you care about first. DunGen saves to your browser's "LocalStorage" not to a server. Clearing all LocalStorage will wipe out any saved and edited dungeons.
Comments welcome at the Ruminations blog linked above or on G+. If you like hacking, take a look at the dungen_stock.js file first. It's pretty easy to customize content there. DunGen is now up on Github.