where is the x64 command line version?

[rwideman]

I ran JkDefragCmd64.exe as a scheduled task in Vista forever.  I was wondering what the same option is today?  If I remember correctly the installer checks if it is x86 or x64 OS and installs the correct files.  With MyDefrag I do not find the command line version, which I think using specific switches would be equivalent but I dont find the "no window" switch. 
Any ideas?
Thanks
Robert

[jeroen]

MyDefrag has a commandline, but is supposed to be controlled via scripts, so there are only a few basic commandline parameters. The program is "c:\Program Files\MyDefrag v4.1.2\MyDefrag.exe". See the WindowSize setting to run without a window.