The EXTENSION post processing command to change the extension of a file. from "gcode" to just "g"
{EXTENSION "g"}
if the file does not exist already it will putout "file.g"
if "file.g" exsits and I say yes to overwrite it, another file "file.gcode" appears.
now there are two files "file.g" and "file.gcode".
"file.g" was not over written.
Repro...
Make the file "file.g". decrease layer height to increase layers number and increase file size. save the file again.
"file.g" does not change in size and "file.gcode" the new file is clearly larger.
I seem to remember this was a bug a while back and was fixed now it is back