Accented characters not allowed in file names is a recurrent problem and pain in the butt

File names do not accept accented characters.  Everytime I upload a file that containts an accented character (lots of accented characters in french) Sitebuilder Plus returns an error.  I have then to rename my file to remove the accented character.  That is a problem because I end up with different versions of the same file.  For some unknown reasons, Homestead is the only software that I know that has this problem. Can you fix that please?