I did (a) but didn’t work, and for (b) it’s too late because I already deleted the old folder.
I found out that the two “new” folders belongs to something else, so it’s not an issue.
I still can’t active the plugin, I have this error code:
Warning: require_once(/home/data/c0102373/public_html/wp-content/plugins/event-calendar-scheduler/codebase/dhtmlxSchedulerConfigurator.php) [function.require-once]: failed to open stream: No such file or directory in /home/data/c0102373/public_html/wp-content/plugins/event-calendar-scheduler-3/scheduler.php on line 51
Fatal error: require_once() [function.require]: Failed opening required ‘/home/data/c0102373/public_html/wp-content/plugins/event-calendar-scheduler/codebase/dhtmlxSchedulerConfigurator.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/data/c0102373/public_html/wp-content/plugins/event-calendar-scheduler-3/scheduler.php on line 51
BTW, the plugin page tells me the plugin’s version is 2.0 .