Hi!
MLInvoice 1.21.1 has been released. This release contains just a couple fixes. See https://www.labs.fi/mlinvoice_features.eng.php#changelog for full changelog. Installation package and instructions are available at https://www.labs.fi/mlinvoice_installation.eng.php, but automatic update directly from MLInvoice is the easiest method.
Regards,
Ere