CCleaner64 won't go away...

ccleaner64 won't go away! just installed the newest version, which usually removes the older version. Not this time. Plus there seem to be 15 instances of it running.... grrrr

It would just install over itself overwriting the previous files with the new version. Fifteen instances sounds strange, restarting your system might take care that.

All those instances might be a bug, still exists in v5.54 since another user made a bug report with a screenshot.