You can download the latest version here:
Or use direct link:
https://github.com/EFLFE/Artorio/releas ... _1.2.0.zip
Use filters to define one color (in the range from 0 to 255) and convert it to tiles.
The image size should not exceed 256x256. This restriction can be bypassed (Help->About->ExtremeMode), but then the size of the blueprint in the game will be huge. By default, the palette has three colors: stone-path (dark), concrete (light), and hazard (yellow).
Have fun ^^