Hi John,
Great question! Yes, we defintely recommend using the same versions numbers across all of our plugins. Otherwise, there can be functional issues that pop up.
If you have access to the latest version of Events Calendar PRO (4.3.2), you should be able to get it by logging into this site and downloading it from the My Account > Downloads screen.
Once you’ve downloaded the latest version, you can follow the instructions outlined here for installing the update:
Manual Updates
If you do not have access to Events Calendar PRO 4.3.2, then I would recommend downloading The Events Calendar 4.2.5 and installing that in place of the version you currently have installed. You can find all past versions of The Events Calendar here on WordPress.org:
https://wordpress.org/plugins/the-events-calendar/developers/
Cheers!
Geoff