Hi!
The latest plugin version (4.5.3) deals with apostrophes a bit better then the older ones. Still, it is a bit more complicated problem, as apostrophes usually raise security concerns. The older plugin versions simply ignored apostrophes, the new one uses a better escaping method which should work in most cases. There also was a changed in wordpress core code lately regarding safely storing these “special” characters.
If you are using an older version, I suggest updating to 4.5.3, it should make a difference. Safe update guide.