Would it be ok for you to send me your config.xml file and layer set xml file (and the sprites if possible)? Then I'll look into that for you.
This should now be fixed - the issue was that the program ran out of memory whilst loading huge textures, but the 64-bit build should solve that!
https://rahisaurus.itch.io/rahituber/devlog/714677/update-2024-04-14