THERE IS ONE MORE IMPORTANT THEN MENTIONED THING-
according ISO in architecture arrows should look like 45 degree line like
it's the only reason why I am not using like the main program QCAD. And another reason I have no time to compile open source QCAD to use that looking arrows. So I have to stay on windows running another free software.
anyway you are not using that kind of arrows
I looking forward for changes in community edition too