The release notes for this new version:
- Added a new minor feature:
Display a checkerboard overlay on top of the game board.
Some expert solvers use a parity concept during the solving process, and here it helps that the checkerboard coloring shows the odd/even parity of each square.
The options for this new feature can be found in the 'Settings' window in section "Graphics | Board | Checkerboard overlay".
Thanks to Matthias Meger for suggesting this feature.
A feature comparison of the main Sokoban programs can be found in the Sokoban Wiki.