Well, you can't.
Long story short, the buttons don't work right, the sound doesn't record, and you are basically screwed when trying to restore the firmware, since Lightdow does not have a site. Luckily, I was able to contact them, and get a copy of the stock firmware, which seems to not exist anywhere else online, so I will include a download link below. Contact me if the download goes bad, and I can add a different link.
1012a_welcome_en_20160429.zip |