UserGuide.md: Update editing data file

docs/UserGuide.md

@@ -653,8 +653,9 @@ Advanced users are welcome to update data directly by editing that data file.
 <box type="warning" seamless>
 
 **Caution:**
-If your changes to the data file makes the format invalid, *AssetBook* will discard all data and start with an empty data file at the next run.  Hence, it is recommended to take a backup of the file before editing it.<br>
-Furthermore, certain edits can cause the *AssetBook* to behave in unexpected ways (e.g., if a value entered is outside the acceptable range). Therefore, edit the data file only if you are confident that you can update it correctly.
+Editing the JSON file directly is a feature meant only for advanced users. 
+If you edit the JSON file, it is your responsibility to ensure that the edits are valid.
+If the JSON file is invalid, a warning message will be shown when *AssetBook* is launched.
 
 </box>