Silver B&W Photo Converter version 2.1.3 is available to download on the App Store and is offered as an update to all current users. This is a fix to some issues we have detected. You will see improved performance on Apple Silicon Macs (the ones having M1 processor) and also improved file handling.
Mac apps downloaded from the Apple App Store technically run in so called Sand Box. To users it means that there is extra layer of security. To us developers it means extra work to try to figure out how things should be done to let everything run smoothly and so that the security does not hinder usability. There was sometimes trouble saving the edited photos but we think we got it right this time.
Link to Apple App Store https://apps.apple.com/app/apple-store/id1501659637