Sounds cool! Did you also redo all the encounters? Although, unfortunately, there's not much you can do for the kingdoms.
Glad to know someone found it fun. I'm still running the D&D campaign I started in it, 2 years ago.
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I left the encounters how they are. I'm using them to generate general threats in the area, not tied to specific coordinates (for the most part: I do use the ruins and boss monsters, just re-interpret for the setting). I changed the encounter and luxury sprites into various run down buildings (I used SNES sprites). I'm treating those icons as rumors, "Your character heard about 'x' at that place" - so they're all visible to the players at the start. I'll be using additional generators to then fill out the maps with "secrets" to find.
I'm using all the kingdoms to represent settlements and stuff. It's super helpful. By using your program I've easily avoided like 40 hours of game prep, at least. And it's also a lot of fun to use! If you're curious, this is the map your program generated for me https://imgur.com/a/ITuE7Cb. I hope you don't mind that I'm using it this way. I rarely comment on stuff, but Sandbox World Generator is by far one of the most useful pieces of software for campaign prep that I've encountered. I'm running a "west marches" styled game for people online, and the map this outputs is fantastic!
I have to say, the truck icon is my favorite. :D
I'm thrilled you're finding it useful. I do apologize for the rivers not actually connecting; I never did quite find that bug. You can actually edit the rivers if you want, but I've never found it worth the time.
My original goal was to have the map zoom in to the 5'x5' tactical level, but then I remembered I have a day job. :D
West Marches was always my goal, but I've been running a fairly traditional campaign. My players decided to move a domain square over, and now I'm struggling to flesh out the dragon that lives there (I write everything up and put on-line as adventure supplements). Having all the kingdoms laid out gives me a framework to invent the politics, which admittedly the players don't care so much about. Yet. :D