Hi, Thanks for the kind words about Dungeon Maker Sketch and i'm glad you have found it useful.
Dungeon Maker Sketch development is currently on hold, you can read more in this devlog: https://feetupgaming.itch.io/dungeon-maker-sketch/devlog/409022/the-good-and-the... I do however keep messing with experiments on how I would re-develop the software and is definitely not abandoned, but it is on a somewhat long term hold as I'm focusing on freelance work (to pay bills) and university study right now.
In the meantime there is a feature to use custom assets if you wish to expand the objects and tiles and even without continuous updates I do hope you enjoy using Dungeon Maker Sketch.