Issue title: Native FFmpeg broken
 Issue body: When I execute `ffmpeg` and `ffprobe`, I get the following errors:
```
Failed loading ffmpeg from ffmpeg.framework/ffmpeg, cause = (null)
Failed loading ffprobe from ffprobe.framework/ffprobe, cause = (null)
```

I would love to be able to use the native version of FFmpeg instead of the webAssembly one, but it doesn’t seem to work on a-shell 1.8.1.
 Comments: 
 Comment 0: Hi, 
this has happened in the past with other users and other commands. It seems to be an issue with iOS security. Rebooting the device and / or re-installing a-Shell could fix it. 
 Comment 1: Reinstalling did the trick for now. Thanks for the help!
{'source': 'GithubIssues', 'repo_name_with_owner': 'holzschu/a-shell', 'issue_id': 1085026461, 'repo_stars': 1595.0}