Install AAC libraries
Windows:
1. Download libfdk-aac-2.dll from this folder
2. Go to the installation directory of butt by typing %LOCALAPPDATA%/butt into the file explorer
3. Copy libfdk-aac-2.dll into the installation directory of butt
4. Restart butt

MacOS:
1. Download butt_libfdkaac_macOS.pkg from this folder
2. Open it and follow the installer instructions
3. Restart butt