A. 1. Regularly save your projects and back them up to your device or cloud storage. 2. Check the app's settings to see if there is an auto-save feature that can be enabled. 3. If a project disappears, check the app's 'recent' or 'saved' sections to see if it is still accessible.

B. 4. If projects continue to disappear, consider exporting your work frequently to ensure you have copies saved elsewhere. 5. Keep your app updated to avoid bugs that may cause projects to disappear.