Fatal error after updating to UsersWP 1.0.18, cannot activate plugin anymore

After updating to UsersWP 1.0.18 (with GeoDirectory 2.0.0.23 and Genesis Theme) I get this error:

Plugin could not be activated because it triggered a fatal error.

Fatal error: Uncaught Error: Call to undefined function uwp_generate_default_pages() in /home1/warmarks/public_html/off24/wp-content/plugins/userswp/includes/class-activator.php:121 Stack trace: #0 /home1/warmarks/public_html/off24/wp-content/plugins/userswp/includes/class-activator.php(66): UsersWP_Activator::generate_pages() #1 /home1/warmarks/public_html/off24/wp-content/plugins/userswp/includes/class-activator.php(57): UsersWP_Activator::install() #2 /home1/warmarks/public_html/off24/wp-content/plugins/userswp/userswp.php(37): UsersWP_Activator::activate(”) #3 /home1/warmarks/public_html/off24/wp-includes/class-wp-hook.php(286): activate_users_wp(”) #4 /home1/warmarks/public_html/off24/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array) #5 /home1/warmarks/public_html/off24/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #6 /home1/warmarks/public_html/off24/wp-admin/plugins.php(180): do_action(‘activate_usersw…’) #7 {main} thrown in /home1/warmarks/public_html/off24/wp-content/plugins/userswp/includes/class-activator.php on line 121

I cannot activate the plugin anymore.

Please help. Thanks,
Marc