If your computer crashes or the app crashes but can be rebooted, Construct has an auto-recovory system that takes a picture of your data every five minutes. If your system catastrophically crashes, the program data file is the best solution. As a backup plan for potential catastrophic failure, consider creating routine backup files and storing them on a network drive or external drive.
To learn more about backing up your entire Construct program click here.
To access and set this feature click on Tools > Options > Recovery from the main toolbar.