Sorry I haven’t had any luck with the plugin either, but I just posted in another thread, so I thought I would add in case you are unable to get the soundvis plugin working for you:
FMOD is releasing a plugin in early September for UE4, and will have a pre-release version available soon if you sign up for it.
Here is the quote from my forum question about availability last week:
Keep an eye on page in early September for the plugin:
http://www.fmod.org/download/