Replays are located in two different locations depending on the version of Strinova you play
Global
%localappdata%/Strinova/Saved/Demos
CN
%localappdata%/Calabiyau/Saved/Demos
To get to the folder you can paste it into the search bar of the windows file explorer use the shortcut of
Win + R
and pasting the directory listed above then clicking enter.
From you can drag and drop the files onto https://nekolytics.gg and they will be uploaded then processed.