I did change the install path to my installed directory. Didn't work. It also didn't appear to install at all. Just ran a temporary execution, if that makes sense. Also, I recently deleted the 7 GIGS worth of updates in the Update folder.
That does not work for me. Running the update manually does not take. It also launches a fresh (unpopulated, unregistered) version. Closing that and restarting the program reverts to 8.6.1. This is on two different machines (Win7 and Win10) with the program installed in a location other than default.