This version is already old. The newer version 5.1.4 fixes many problems as described in the post http://showsize.com/blog/index.php/2010/04/05/v514/
Fixes: In version 5.1, at the top of the Active Folders report, the number of days could not be changed due to a bug. The same problem existed in Unused Files report (available only on pre-Vista systems). This has been fixed in version 5.1.2.
