Keep a recovery path

  1. Back up the folder and close other editors that might change the same files.
  2. Use Command-Option-F and inspect the matches for the exact target text.
  3. Apply the intended replacement. Reopen representative notes and check links, headings, and code.

When the same word has different jobs

A product name in prose may also occur in a URL or filename. Restrict or review those cases instead of applying one replacement indiscriminately.

Backups and history serve different jobs

MarkThatDown history is optional Pro functionality and is not a substitute for a complete folder backup.