DaVinci resolve 9 and 10 won't open, has worked in the past

Whenever I try to open resolve it crashes straight away and I get this error message in the crash log:

dyld Error Message:
Library not loaded: @executable_path/../Libraries/libavdevice.dylib
Referenced from: /Applications/DaVinci Resolve.app/Contents/MacOS/Resolve
Reason: Incompatible library version: Resolve requires version 54.0.0 or later, but libavdevice.dylib provides version 52.0.0

I tried updating to the beta but it didn't fix it. Any ideas? I tried downloading ffmpeg and replacing the dylib files with the 54.0.0 versions but it didn't make a difference.

Same problem here

Did either of you guys install FFmpeg manually or through MacPorts or something like that?
Perhaps Mavericks is incorrectly picking up a version you have somewhere else on your computer.