ccleaner professional not working after electronic purchase

CCleaner for Windows CCleaner Windows Help Requests
1

I purchased ccleaner professional today 3/29/20, and it is not working. It is supposed to be valid until 3/29/2021

2

What anti virus are you using?

What operating system?

3

And when you say 'not working' how do you mean? (Not installing, not running, not registering, not cleaning, other?)