Euler Search Windows' direction

Hi,
I have some questions about Euler Decon. While we are running Euler method on a gridded data as I understand - from the illustrions ont eh manual and the Theory description- the search window is always moving from right to left and from down to top( west to east and south to north).

Here is the question:

Would it be there any change on the soluotion if we chane the search windows' application direction? In theory there shouldn't be any? But is there any experiment about that or can I change the direction of the search window manually on the run.

Thanks for concern

Best regards.