Write to markdown@johanraes.be. One person reads it, so it may take a day or two.
Another app has claimed .md files. Right-click the file in Finder, choose Get Info, pick markdown.md under “Open with”, and click “Change All”.
Open the Mac App Store, click your name at the bottom of the sidebar, and download it again from your purchases. You are not charged twice: the purchase belongs to your Apple Account, not to the machine.
Send the .md file along with your message. Markdown has a lot of dialects, and seeing the original is the fastest way to find out what happened.
Last updated 14 September 2026