My client machine apparently had the server installed.
I followed the uninstall steps in the Wiki to remove everything. Then reinstalled (and the installer still presented the options to Upgrade the 3 server components, even though I thought I had removed all of the various files (even had to use csrutil from Recovery console to remove IndigoOverrides/kext).
On launching the client, it said my permissions needed to be fixed and sent me here to /perms. I downloaded the PermFixer; no fix.
I reinstalled the client; no fix.
Thinking the manual un-install missed didn't take.
Any ideas?
The permissions fixer displays "/Library/Application Support/Perceptive Automation/Indigo 4"