EDIT: Nevermind! I uninstalled FMOD studio and installed 2.00.12 instead and it worked fine!
I apologize if this thread is a little old to be resurrecting but i figured it would be better than making a new one. I’m having the same issue of receiving the “the version number of this file format is not supported” error. I just downloaded Fmod version 2.01.04 and I’m using Unity version 2020.1.3f1. If my screenshot uploaded successfully you can see it already has the code fix from that github file implemented into it.
What I find interesting is that when i first encountered this, the line “string pluginFolder = Application.dataPath + fmodLibPath + “/win/X86_64/”;” was shown as a collection of local variables and strings (yellow and green on my visual studio setup) while the code under each subsequent “#elif” was displayed as plain (white) text. I then tried the suggestion of deleting the banks from StreamingAssets and the Studio build directory as well as deleting and re-importing the unity plugin. After doing that, the “string pluginFolder = Application.dataPath + fmodLibPath + “/win/X86_64/”;” line of code is now also displayed as plain text. Could this be related at all? I’m still in the process of learning how to code so my knowledge is pretty limited.
Thank you for being so helpful to people on here!