I had installed the Fury Ball using the default workflow through the install wizard. The first time I installed, a it's "already installed" prompt appeared, but then the installation continued anyway, and the R17 FurryBall files were written to the Program Files / Maxon / Plugins directory, however inside c4d, there was no FB.

I tried the recommended "run installer as administrator" option (windows), and still, nothing. Uninstalled / reinstalled, etc.

I finally made a R16 dummy directory and installed R16 files to it. I then copied these into the R17 plugins directory, and viola, FurryBall was ready to roll.

Hope this helps anyone who may be having issues.