Keep a recovery path
- Back up the folder and close other editors that might change the same files.
- Use Command-Option-F and inspect the matches for the exact target text.
- 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.