Deleted the file from FTP. Thanks for the help, much appreciated!
I believe I’m having the same issue. I downloaded the plugin and crashed my entire Wordress site. I’m unable not even able to access the login page to access my dashboard. Unable to disable the plugin as all I can reach is a page stating “Fatal error: Call to undefined function optinrev_w3tc_patch() in /home/’my website’/’my url’/wp-content/plugins/optin-revolution/optinrev-fn.php on line 15”