Now supports .slot files.
How to use
Download PolyConverter.exe in the Assets list below, and place it inside any folder that has .layout or .slot files in it (the game stores its files in Documents\Dry Cactus\Poly Bridge 2\).
When you run the program, the .layout and .slot files will be converted into .json files.
By pressing Enter to run the program again, all the changes you made in the .json files will be applied to the .layout and .slot files (or vice-versa).
A backup of the original file (before any changes) will be created if one doesn't exist.
You can keep applying new changes as many times as you want without having to close the window.
If the program doesn't run in your computer (it opens and closes immediately) download and use the self-contained version instead.