I've started using noteperformer and I need to batch export stems. It's daunting to export them one by one if you have a massive 30 stave score.
I found out there's a plug in for "that other" program as Tim Davies puts it, but there isn't such for Finale.
I also was looking for a way to develop a plug in myself, but I didn't find the SDK.
I hope that you guys open up to the community because custom plug ins is what would keep finale alive for 10+ years. Have a look at games like Skyrim (it's 10 years old now), which is getting a 4th re-release, because people can install 1000+ mods to fix everything that a small team like yours would just not be able to physically do.