update not working

I recently downloaded the latest version of CCleaner (ccsetup541) and after it installed and i ran the software it said there was a newer version available (542) but when i visit piriform to download it i just get the same version (541),so,????????

Are you by any chance using the browser Mozilla Firefox? (Simple yes or no suffice)

No

I googled version 542 and download and installed it with no problems