I’m not sure what you keep mentioning Icarus in particular?
It’s a game, so shouldn’t be conflicting with a cleaner.
However many users have already rolled back to CCleaner v6.39.
(2,000 plus v6.39 installer downloads and rising on the below link alone).
For the download link(s) and roll back instructions click this: How to Roll Back from v7 to v6.39