Removing Mac Cleanup Pro

First, that wasn't a legit Flash Player from Adobe, so you may need to remove that too.

https://www.precisesecurity.com/rogue/how-to-remove-mac-cleanup-pro

Malwarebytes…

https://www.malwarebytes.com/mac/

Read the first answer in this thread.

Cannot remove Mac Clean UP pro from my MacBook Air

Need to remove Mac Cleanup Pro--help

It was apparently installed when I updated the flash player.

Those things are scams.

Beware bogus Adobe Flash "installers" - Apple Community