vapier's tabs backup

Glad it works well for everyone, I had it set to auto back up every 30 minutes and apparently it did not create a backup with the exception of the first time it was installed on 8-25; it is now 9-22 and I closed my browser to restart it assuming my tabs would be backed up and they were not. Useless for me.

There should add a function that I can close the auto backup, one of my most important backup were gone cause I thought the auto backup was closed and the backup can stay for longer... :(

Can you add the option to not delete manual backups automatically? I didn't know it does and lost a very important backup, I thought it only deletes auto backups.