I've found a great plugin for WordPress under GPLv2 license and made a lot of changes in source code, plugin does something else now. I modified author (with original plugin author's credits), URL, version number (from xxx 1.5 to YYY 1.0).
Everything works great, but when WordPress checks for plugin updates it treats my plugin YYY 1.0 as xxx 1.0 and displays notification about available update.
My changed plugin YYY 1.0 was installed by copying files from my computer, not from WP repository.
What else do I have to change?
Disable plugin update
Add this code in your plugin root file.
add_filter('site_transient_update_plugins', 'remove_update_notification');
function remove_update_notification($value) {
unset($value->response[ plugin_basename(__FILE__) ]);
return $value;
}