You could have downloaded p5x36 2.0 from our software library for free. P5X36.EXE is the most common filename for this program's installer. P5x36 lies within Games, more precisely Puzzle. The most popular versions of the software 2.0 and 1.0. This free software was originally designed by Ihsan.
From the developer:
This program will generate a 36 word puzzle for you to solve at your leisure. All words are 5-letter long, six letters are provided as hint, letters can be random, all same, or user defined, overlapping letters in words must be same, a word cannot be made twice. You can use three standard or your own dictionary.
You may want to check out more software, such as Sudoku XL-Solver, Leaf Buster or Play Basic Learning Edition, which might be related to p5x36.