A. 1. Check for backup options: If the app has a backup feature, ensure you have enabled it before updates. Look for settings related to data backup within the app. 2. Re-add lost entries: If you have a record of your portfolio, manually re-add the stocks to your portfolio after the update.

B. 3. Check app settings: Sometimes, updates may reset certain settings. Go through the app settings to see if your portfolio can be restored from a previous state.