Multisite and upgrading Duplicate Post

Hello,

I have a problem after upgrading Duplicate Post:

1. Install Duplicate Post 2.6 on a multi-site/network WordPress
2. Visit dashboard of two blogs
3. See the “Copy to a new draft” feature copies the post content
4. Upgrade Duplicate Post from 2.6 to 3.2
5. “Copy to a new draft” copies post content on first blog, but not the second blog.

I didn’t change any settings, but Looking at Settings > Duplicate Post, most of the checkboxes are unchecked on the second site.

It looks like function duplicate_post_plugin_upgrade() only upgrades one blog. I was able to get the defaults to work with this patch:

--- a/wp-content/plugins/duplicate-post/duplicate-post-admin.php	Wed Aug 16 08:47:38 2017 -0400
+++ b/wp-content/plugins/duplicate-post/duplicate-post-admin.php	Wed Aug 16 09:51:06 2017 -0400
@@ -12,7 +12,7 @@
  * Wrapper for the option 'duplicate_post_version'
 */
 function duplicate_post_get_installed_version() {
-	return get_site_option( 'duplicate_post_version' );
+	return get_option( 'duplicate_post_version' );
 }
 
 /**
@@ -178,7 +178,7 @@
 	delete_option('dp_notice');
 	
 	delete_option('duplicate_post_version');
-	update_site_option( 'duplicate_post_version', duplicate_post_get_current_version() );
+	update_option( 'duplicate_post_version', duplicate_post_get_current_version() );
 	
 	delete_option('duplicate_post_show_notice', 0);
 	update_site_option('duplicate_post_show_notice', 1);