The shots are different sizes because you have limited ability to change the app window size.
Here is the basic app before it starts:
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Here it is running:
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Here is a shot of the output files. Crucial is the function to automatically handle duplicates in the list, because the entire concept came about when doing ordinary saving, having to constantly answer "do you want to replace the existing duplicate". However the numbering method does update the number sequence so that if you have an itemized list, #8 is still #8, even if it's in fact the same page as #2.
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It is intended to be "Run and Forget". I haven't powertested it for colossal data sets, it's prob. not industrial-enterprise grade, but a big test set I had was 215 items. I am a real fan of Trandesk from here, and it runs in the background under Trandesk, and it doesn't use a browser instance like I first envisioned, so I think you can often "park it" to run a batch and then come back to it later. It was crucial for it not to halt mid way and ask about what to do with something, so there are a couple small quirks left over with that.