HI
The FMODStudio script not being found problem is caused by the fact that the latest plugin is built against 4.5, but the example project setup will launch version 4.4. It will try and use 4.4 if you use the launcher or by double clicking on the UE project file. I had the exact same error message.
Obviously if you’ve installed the latest plugin to the 4.5 folder it won’t find it + the plugin won’t work in the 4.4 folder.
You can fix by installing FMOD 4.5 plugin to UE 4.5 folder, using the UE launcher to open UE 4.5 editor (without a project) and then select the FMOD project from File->Open Project.
You want to use the “copy” option for the project when asked about converting it.
method worked for me and I have the example running (albiet it crashed the 1st time, just reloaded the project again and it worked)
I’ve no idea yet if the conversion process “breaks” anything, there weren’t any errors & it seems to all be working as expected - I hear the vehicle & character audio.
There is a link on the FMOD site about older versions, but they’re not clearly labelled as to which version of UE they are for - I’d assume 4.4. If you don’t want to convert, etc you could try installing the older FMOD 4.4 version to UE 4.4.
Hope that’s helpful
Cheers
William
PS: I can confirm the post above - there’s no audio in the standalone game mode, nothing at all.
PPS: Vehicle audio now sounds awesome! 
PPPS: +1 for Github source access
PPPPS: Would be good to have the same tutorial in C++ format, ie no blueprints for the setup part