Just got my new ccleaner and paid for it, but it had this "Kamo". I thought it was a scam and uninstalled everything. Now I need to reinstall everything without paying twice.
You can download a new CCleaner installer from here:
https://www.ccleaner.com/ccleaner/builds
Once downloaded just double-click it to install.
You will probably need to use your licence key to re-register it again, open CCleaner and go to Options>Licence Key to re-register.
Presumably you bought the Premium? There are similar 'builds' pages for Recuva, Speccy, etc.