[Kamo update fails with 'cannot find local file' error]

Tried again today.  Clicking on the DOWNLOAD button opened the download in Chrome instead of my default browser (Epic).  Ran kamo_online_setup.exe.  it asked for a restart, which it hadn't done in previous attempts.  After restart, got same error:

[Kamo update fails with 'cannot find local file' error]

I've been getting a popup on my computers to update Kamo to v2.3(?).  I download the kamo_online_setup.exe and run it.  When installation is almost complete, I get an error similar to the subject error.  Same on 3 computers.  Same after downloading the free download directly from CCleaner.com.  Same after uninstalling v1.3.

Only recovered by re-installing from the original full v1.2 install file and updating to v1.3.  No further updates available when I click the 'Check for updates' button again.

Anyone know what's going on?