New Feature: Possiblity to lock cells. Pre-allocated cells in generated Sudokus are locked by default. Locks can be set or unset by the respective menu item.
Corrected Bug: Some missing german translations added.
Miscellaneus: Some performance enhancements and code restructuring.
New Feature: When minimizing a problem the the calculation stops if the current problem is harder than the required severity level.
New Feature: The function "Export as HTML-Page" now includes the problem's comment, if any.
Corrected Bug: The tab-order in "Options" dialog was more or less random. This has been fixed.
Corrected Bug: When generating new booklets with minimized problems it happens that the output incorrectly states that a problems has more than one solution. This has been fixed.
Corrected Bug: The German translation of the menu item "Problem|Generate|Classic Sudoku" was incorrect. This has been fixed.
Miscellaneus: New sample booklets uploaded (see here).
Corrected Bug: The function to generate minimal problems found only local minima. This has been fix. (Unfortunately for problems with many pre-allocations it may now take a very, very long time to find the global minimum... But it is possible to abort the minimizing using the menu item "Problem|Abort" or by pressing Ctrl-F4.)
Corrected Bug: The current cell was not highlighted when the option "Show neighbors" was enabled. This has been fixed.
Corrected Bug: In some cases the minimization didn't find the minimized problem. This has been fixed.