Disable updates for event-tickets and event-tickets plus plugins in Wordpress. These plugins should be in-sync and since the plus version is paid it doesn't auto update like event-tickets plugin.

event-ticket-plugins-disable-updates.php

<?php 

/**
 * The event-tickets and event-tickets-plus plugins must be in-sync and the same
 * version number, so let's not update event-tickets plugin unless our paid plugin
 * is later than 4.2.7
 *
 * https://gist.github.com/shoreline-chrism/f8e172178e47e7a12c3ca318a6f4f7d5
 *
 */
if ( !function_exists( 'shoreline_event_tickets_plugin_disable_updates' ) ) {
  function shoreline_event_tickets_plugin_disable_updates( $value ) {
    // Check that both plugins are active
    if ( class_exists( 'Tribe__Events__Main', false ) && class_exists( 'Tribe__Tickets_Plus__Main', false )
      // Make sure event-ticket-plus is the older version that we have license for
      && version_compare( Tribe__Tickets_Plus__Main::VERSION, '4.2.7', '<=' ) >= 0
      // If both plugins are the same version number, remove both from auto update
      && version_compare(Tribe__Events__Main::VERSION, Tribe__Tickets_Plus__Main::VERSION, '=') >= 0
    ) {
      unset( $value->response['event-tickets/event-tickets.php'] );
      unset( $value->response['event-tickets-plus/event-tickets-plus.php'] );
    }
     return $value;
  }
  add_filter( 'site_transient_update_plugins', 'shoreline_event_tickets_plugin_disable_updates' );
}