I installed Events Calendar, then found another one that turns out to be the same calendar, only an older version. I installed the plugin, but did not activate it. Once I realized they were the same, I tried to delete the old version, but it won't delete. I deleted the events-calendar directory via FTP and it still shows up. It won't upgrade automatically or delete. I'm not sure what else to do? Even if I upload the OLD version and try to upgrade that, it won't do it.
It must have something to do with the version stored in the DB, but I can't find any SQL statements in the plugin to check versions.