🚀 go-pugleaf

Dear folks-
  I have noticed that when I read a LaTeX file using word6 editor
I press alt + r  (to read)   and then type in filename.tex.
Well, if you have flying fingers and haven't had that morning cup
of java (coffee) yet, it can easily come out filename.texz
and the file will be read and appears on screen.  I do corrections
as required, then save using alt + w (to write).  The problem is
the file is saved as filename.texz and if you're sleeping at the
wheel, so to speak, you will do corrections on filename.texz
and can easily miss this subtle change in name.   Of course, there
are more corrections, and without realizing it, the filename.tex is
read, and you do corrections to the *OLD* version.   Is there a way
of avoiding this?  Can improvements be made to LaTeX that will
ensure you can't call up a file that has been (slightly) mistyped?
Has anyone out there encountered this before?
  In short, I hate to have to do any job twice.
  Regards,
  Peggy Ravitch
  UNC Statistics LaTeX Woman   (That's with a capital "W")