Project recovery is supported in Storyline 360 builds 3.29.19305.0 (June 18, 2019) and later.
Storyline 360 helps you recover a project that corrupted after an unexpected event, such as a computer crash. The next time you try to open the project, Storyline lets you know if there are any temporary versions that you can restore.
When you see the Project Recovery window, click the drop-down arrow for the file you want to restore, then select either Open or Save as.
If there are multiple versions of your project and you're not sure which one to open, you'll probably want to choose the one with the most recent timestamp since it's likely to have the latest changes.
Let us know if you have questions. We’re happy to help!