PowerResizer for Windows

Great Idea, Can't Make It Work. I installed it more than once on 2 different machines. One operates under Windows XP and the other under Windows Vista Home Premium. Both have automatic windows updates, and all current service packs installed. Neither computer performes with this program as described. At best, one or sometimes both open windows will "left justify", the one window covering up the other. No window will "snap" to the right side, bottom or top of the screen. When I grab the top of the window and drag it to the right, top or bottom of my screen, it just goes off the screen as if powerriszer was not installed. Sometimes the second window towards the right will act like it snapped into place, but when I grab either the right side of the left window or the left side of the right window, no "magic" occurs. The window wall being grabbed simply covers up the other windows just as it would if the program was not running. I have the "Enable Power Resizer" ticked at all times during these tests. I have uninstalled, re-installed and re-downloaded the program, but to no avail. The program does not work on either of my computers, both using different and current operating systems. Pros: Great idea. I want this program to work since I often use multiple windows. Cons: Can't make it work.