1. Make sure your RVSitebuilder is the latest version. https://rvsitebuilder.com/v6/changelog
2. Create a folder in this path /home/{user}/.rvsitebuilder/projects/xxx (the folder name as anything you want)
3. Download file /home/{user}/public_html/rvsDbBackup.sql on latest publish
4. Upload the file above into /home/{user}/.rvsitebuilder/projects/xxx/rvsDbBackup.sql
( or Copy this path /home/{user}/public_html/rvsDbBackup.sql to /home/{user}/.rvsitebuilder/projects/xxx/rvsDbBackup.sql)
5. Back to RVSitebuilder Home Step, click at You have {} missing project to recovering. Recover Project
6. Select the project and click "Restore"
7. After finished restore. Remove file /home/{user}/.rvsitebuilder/projects/xxx/rvsDbBackup.sql