First of all, hit you with a review since this is extremely useful and ratings were desert-dry-empty for some reason. Second of all, just checked out the documentation, and I'm now thoroughly convinced that you are, in fact, a legend. Like really, that is some super-high effort and gorgeous. One thing to note, I installed the software completely ready to blast a negative review - my usual process for random tools from the windows store, but was pleasantly surprised by how awesome this is.
I think that this is extremely useful, and I use a lot of procedural software. A few questions though - Was this written solely by you? If so, and I'm not sure how involved it would be, but couldn't this be ported over to electron instead of uwp fairly easy? For cross compatibility of course. In my opinion Affinity products (and the entire graphics design market as well) are more targeted towards Apple users, and hate to see the rare instance of a /very good/ windows store app going unnoticed.
Thanks for all the effort you put into this!