Malware bytes pop up in Safari after uninstall
Hi
I've an annoying Mawarebytes pop up after running uninstall. I downloaded and installed the free Malwarebytes tool and then decided I did not want to subscribe. I followed the Malwarebytes uninstall instructions and also permanently deleted any reference to malwarebytes programmes in trash. But I still get a pop up in the right hand top corner reminding me that 'a newer version' is available. This happens every time I open Safari. i've searched my hard drive and it shows no 'malwarebtes'.
How do I get rid of this annoying pop up? I'm running Safari version 12 and Mac OS High Sierra on a MacBook Air.
iMac (21.5-inch Mid 2011), Mac OS X (10.7.5)