As the title says when I hit edit g code a small window opens (not notepad ) and then closes again and the code refreshes and that's it it worked in the  past until I tried Mach standard screen and now im back to the old one it dosnt any help please

Thanks Andrew

You might want to check Config > General Config > Gcode Editor to make sure the path hasn’t been corrupted. The ‘Browse’ button will allow you to select/reset the path. (I like WordPad rather than Notepad for its additional features.)
Al