I have noticed recent improvements to Buildy's development interface and stability (Checkpoints not disappearing). Yet, based on past experience, if your project becomes complicated, misshapes can occur. And when they happen, you could be in trouble.
What can you do to add a layer of "insurance" to your building process? Simple: Following each development step, when you feel your project is progressing correctly, export the code!
Yes, keep a copy of the code on your PC. That way, when something goes wrong, you will have a reliable backup to restore from. You can either give Buildy the entire codebase (if it's not too large) or extract the specific files that need to be restored. Worst case, you can enable the code editor in Buildy and copy and paste the contents of individual files to restore them.
Happy Building!
How To Export The Code: In Buildy, open the project and go to the manage tab. Under App Settings, the second item from the top will be Code Export. Simply click the button and select where to save the ZIP file.