The default is in your system `filetypes.sh` and as distributed is `"./%f"` but that won't give full path AFAIK so you must have modified the setting yourself. Can't tell you what you modified it to, but a guess might be `"%d%f"`.
I never did change it. I didn't even know that option existed! But setting it to "%d/%f" did work, so thanks for the pointer.