Updated Document (markdown)

Document.md

@@ -17,3 +17,9 @@ When you run Trilium for the first time, it will generate a demo document for yo
 ### Restoring demo document
 
 In some cases you might want to take a look at the demo document after you deleted it. Or you might want to see if there was something added (sometimes we add a new feature demonstration into demo document). In such case you can just [download .tar archive](https://github.com/zadam/trilium/raw/stable/db/demo.zip) of the latest document and import it somewhere into the tree (right click on a note where you want to import the demo document and choose "Import").
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+## Manually modifying the document
+
+Trilium provides a lot of flexibility, but with that you can also potentially shoot yourself in the foot (e.g. with startup script which blanks the app view).
+
+In such cases you can manually fix notes on the database layer - you can use e.g. [https://sqlitebrowser.org/](https://sqlitebrowser.org/) to open `document.db` file, find problematic notes and manually fix them. Don't forget to commit / write changes after you're done.