On Windows you can find the log file here: C:\Users\"Your Name"\AppData\LocalLow\Dynamic Dungeons\Dynamic Dungeons Editor.
On Mac you can find the log file here: YourUsername/Library/Logs/Dynamic Dungeons/Dynamic Dungeons Editor/Player.log
If you can't find this library in your Finder: From the Finder menu, click View > Show View Options. The keyboard shortcut is Command+J. Place a checkmark in a box to Show Library Folder.
Send the file itself to this email address:
tamas@dynamicdungeons.com (It's enough to send the latest dated log file) I process all the submitted bug reports and investigate every single issue separately, but do not respond to each form individually, please be patient until the fix comes out.