Note: Once a batch has been deleted from your Plaato Pro, it is irrecoverable.
Plaato Pro Web App
Log into https://app.plaato.cloud/login
Click on "Batches" in the left menu bar
Click on the "Edit Pen icon" on the batch you want to delete
Click on "Delete Batch"
Plaato Pro Mobile App (iOS and Android)
Launch your Plaato Pro App
Tap on the batch you want to delete
Tap on the "Pen" at the top right corner of your screen, beside the batch name
Tap on "Delete a Batch" and confirm deletion.