Remote Preview will download similar resources to an unminified export of your project. I'm not aware of any tool ever having been developed that could reverse even an unminified export back to a Construct project, but it is theoretically possible (although a lot of details would go missing, like comments in event sheets).
If you export your project with advanced minification, it makes it far harder for anyone to reverse engineer it. I suspect (but don't know for sure) that it is infeasible to develop a tool to reverse advanced minified projects back to a complete Construct project - we've specifically designed it to make sure this approach scrambles all the key details of the project. I'd guess it's more convenient for pre-release testing to export an advanced minified copy of your project anyway, as the Remote Preview URL only works so long as you keep the Remote Preview window open, so your testers will have to load the project at the same time as you.
I'd also point out NW.js is deprecated and is going to be removed from Construct in the next few months, although it will continue to be supported in the next LTS release to the end of 2026. It will be far easier to switch to the other export options before you release your project, since otherwise you risk losing things like Local Storage data. So I'd suggest switching over and using the File System plugin for local read/write functionality, as that will be supported indefinitely.