The above solution is flakey because it changes the title as well which can also affect the book cover if it is a Calibre generated one. For completeness I've worked out the best way to solve the issue see :
https://www.mobileread.com/forums/sho...d.php?t=269715
That way the apostrophes get stripped from the filename while the books are being uploaded. So I now use a template
{author}/{title_sort:re(',)}
configured in the device associated with the EReader.
BobC