I tried this as well- and things were still not working-
What has worked for me- and its a work around---
I removed the scripts from the scripts folder- and then in Zbrush prefrences, I removed all paths to cinema 4D by saying "not installed"
Now I hit GOZ from zbrush, and it warns me no apps are associated, but in Cinema I can hit the GOZ import- and the file comes over just fine.
Its an extra step- but it works. Nothing else is working.