What I mean (and let’s come up with a better phrase) is to use the last directory used to open or save a c2d… So…
Assuming “Use Current Directory”:
I open CC, create a brand new design and save it in a new directory (dirA)…then I go to save the gcode the default would be dirA
I open CC, open an existing design currently saved in dirB…then go to save the gcode…it would default to dirB
If I were using “Use Named Directory” and the named directory is dirN (or Desktop, in your example):
Open CC, create a new design. Regardless of where you save the design, when saving the GCODE, the default would be dirN.
Same would hold true even if you opened the design in another directory. Default would be dirN.