Lost data from nightlight

I have 500+ screenshots and most of them just vanish from my profile, do i have to upload it again one by one?

You can batch upload a few at a time if you’re using the website. I’m not familiar with the app itself on Windows, as I’m on Linux. But if you’re familiar with the command line interface, you can use the API to upload all of your screenshots to the site again via a script.

But why would you need to? The matches should still be counted in your database. Why would you need the screenshots to remain? I’m not entirely clear on what the problem, exactly, is here. Could you elaborate a bit?