Popup

Ever since I upgraded to 5.44 free CCleaner, whenever I open the program I get a popup on the right hand side of taskbar to upgrade. How do I disable this popup?

I've already posted a moan about it here:

https://forum.piriform.com/topic/52098-intrusive-ccleaner-pop-up/?tab=comments#comment-296921

This "Summer Sale" popup needs to be rectified pronto. Since updating to 5.44.6575, this popup shows up every time I turn my computer on or restart it -- it's not a one-shot deal. Apparently, it's tied to one (or more) of three cookies that repeatedly show up in CCleaner>options>cookies. These cookies are cleaned when you run CCleaner, but after restarting my PC and getting the popup, they are back. They are also tied to Internet Explorer, which I don't use. If I go into IE and manually clean cookies, they disappear from CCleaner -- but -- as previously stated, they return after a restart along with the popup.

The cookies are: ipm-provider.ff.avast.com; avast.com and www.upsellit.com.

This is beyond annoying. I honestly don't mind a one-time popup as I'm using a free product and the company has a right to try and make money. However, I want control over my own computer and this popup and associated cookies cannot, at this point, be eradicated permanently.