Version 4.52 includes a number of small corrections to allow the program to work correctly under Windows 7. It also includes some reliability fixes that should allow it to deal with certain types of folder damage it may encounter from time to time. Some people may also be interested to know that this version of the program is compiled using Microsoft Visual Studio 2008, and that the process of migrating from Visual Studio 2003 to that version was far from simple.
At the time of writing, there are major redevelopments of the program in progress, both in the user interface and in the low-level foldering layer. We expect to begin showing the results of these redevelopments early in 2010.