don't have the heart to give one start because i admire doug and what he does for the community. and i think the aim of the app is fantastic, very well thought out in terms of including helpful functionality
unfortunately, that functionality just does not work for me. some of the features run half-okay, but the 're-playlist' tool is the main reason i paid for dupin and that does not work at all (nor does the 'consolidate history' tool. you can't use the tools at all in the trial version, so i was forced to take the leap of faith and make the purchase and have since been disappointed.
as a software developer myself im sympathetic to how bugs can pop up, but I've reached out to the developer several times via email and not gotten even an acknowledgement, much less a successful patch. This stuff really would be great if it worked, I just wish i could have some reason to hope that it might at some point.