[Mac] Address already in Use / No Timeline Detected

## What

AutoSubs failed to open. When I manually open AutoSubs, it says "No Timeline Detected". Perhaps it indicates that it cannot find the currently opened Davinci Resolve app.

I checked the error in Console:

```
Operating System: OSX
Main App Path: /Applications/AutoSubs.app	
...n/DaVinci Resolve/Fusion/Scripts/Utility/AutoSubs V2.lua:646: Address already in use
```