You can build your own clock display by clicking the "Format elements ..." button and picking format code elements from the list.
You can use "Fixed width" option to force the clock panel to a fixed width regardless of format or a choice of font.
You can use normal system colors for the clock panel by unchecking "Use Custom Color" option.
You can use normal system font for the clock panel (which is usually the same as the font used for window captions) by unchecking "Use Custom Font" option.
You can use "Do not customize clock" option to prevent changing the taskbar layout.
You can use "Load automatically when Windows starts" option to add an instruction to the system registry that causes AlfaClock to load automatically as part of the Windows boot-up sequence. Do not put a shortcut into the Startup menu if this option is checked, otherwise two instances of AlfaClock will be started each time, with undesirable side-effects.