Is that a newer version of the plugin? Will upgrading to it fix my problem?
Yes, upgrading the plugin should fix your issue. The fix is available in the recent version of the 3.4 - 3.4.1168.22998
Hope this helps!
Okay, I will upgrade it tonight.
Can you confirm whether it is essential that I also upgrade the core plugin or not?
I recently (you may remember my support ticket) had a problem with different versions of the plugins causing problems on my website, and everything is working well, so I am hesitant to upgrade the Core plugin if not necessary.