Apostrophe's not working in senders name

Hi, Awesome plugin – thanks for making it.
One issue is I can’t use an apostrophe in the senders name.
When I save the settings, it inserts an escape \’ character which then also shows on the sent email.

One quick solution was to use an alternative apostrophe from the character set, but I doubt most people won’t know how to do that.

https://wordpress.org/plugins/simple-subscribe/