If I maximize the window and the close and re-open it, the window is no longer maximized.
If I maximize the window and the close and re-open it, the window is no longer maximized.
Also, if you close Defraggler while minimized, the result is even worse... upon restarting, there's completely no window to be found, just a button on the taskbar. Right-clicking it and selecting maximize is the only way I know of to fix it.
I'll get this fixed for the next release.