Puzzles too easy? Issue resolved

Version 1.57.2 fixes an issue relating to the buttons for generating a new puzzle of a particular size:

When the setting to “select skill level too” is enabled and Expert is selected as skill level, the puzzle generator was incorrectly using Normal skill level to generate the new puzzle (instead of Expert). This meant, puzzles that were generated this way were usually too easy.
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This problem is fixed in the new version, puzzles generated this way are now generated using Expert skill level, as they should be.