v5.48.6834 download fails

v5.48.6834 downloads but does not instal. What next?

See if this helps

https://support.piriform.com/hc/en-us/articles/360018683371

The link to download & install cctrialsetup.exe provided in the Support Knowledgebase article that Forum Mod @hazelnut linked here worked like a charm to update both of my paid versions of CCleaner Professional Plus, and the explanation for the minor Certificate change behind this isolated snafu was welcome as well. Thanks for the good work, and the continuing level of superior support that Piriform provides.