I just downloaded FMOD Studio, and I’ve been playing with it for a grand total of two minutes now.
One thing I noticed: when I right-click on a .fsproj file and select “Open With” it had Visual Studio on the list of valid default programs. I found that odd, because why would Windows think to open the FMOD Studio project with Visual Studio?
Turns out that .fsproj is the file extension for F# projects in Visual Studio. I would recommend switching your extension to something that won’t conflict. Here’s a few reasonable alternatives:
.fsproject
.fmodstudioproject
.fmodstudioproj
.studioproject
.studioproj
.fmodproject
.fmodproj
Or come up with your own 
Anyway, this is obviously not a critical issue, but just thought it should be brought up.
- Guy