As I have tested here on eight64 I expect no problem anymore 
Ok, there is still a problem!
LETGUI still requires the folder where LETGUI.exe is in to be writeable. On Win8 systems it is mostly not the case.
I am working on a solution.

Ok, there is still a problem!
LETGUI still requires the folder where LETGUI.exe is in to be writeable. On Win8 systems it is mostly not the case.
I am working on a solution.