http://bugs.winehq.org/show_bug.cgi?id=59034
--- Comment #5 from Andrew Nguyen arethusa26@gmail.com --- In my testing, I have always launched CLM Explorer either from the installer after it completes or by starting it from the command line with CLMLaunch.exe with no Wine processes initially running (so after I ran "wineserver -k" and never from the systray icon). I am able to reliably reproduce the issue with the main window client area this way.
However, I do see that when I enable virtual desktop, maximize the main window, and then close the window, the main window seems to remember the maximized state on subsequent launches. If I terminate all Wine processes and disable virtual desktop, relaunching CLM Explorer does seem to make the main window maximized with a rendered client area. The first launch shows only the area with the size that it had in the virtual desktop, and the subsequent launch shows correct rendering for the full size of the maximized window.