Ken'ichiro Takahashi (Takaken) has published version 7.4 of his great Sokoban solver.
The program requires a 64-bit version of Windows and at least 4 GB RAM.
This version can solve all 90 XSokoban levels!
In this version a few bugs were fixed.
You can download the solver from this page: https://computerpuzzle.net/english/sokoban/ver740/index.html