I had CCleaner several years ago and was happy with it. My computer guru son switched it over to Malwarebites and I never liked it. A couple of months ago I switched back to CClean and thought I was getting the same thing I had originally. Boy was I wrong! Every couple of days a green message comes up telling me I have a problem here or there so I tell it to go ahead and fix it. Next green screen is the price to fix it for only $1.99+. If I had known what I now know I would never have come back.. I have already paid a hundred + and don't get what I had before for $20.
CCleaner does not ask you for money like that, have you installed something else by mistake?
Can you post a screenshot so that we may be able to identify it? (Whatever it is).
PS. Malwarebytes and CCleaner are very different programmes and do very different things.