This is a script for conversion of custom playlist backups for BeatSaber (BFBM) from PlaylistEditorPro format to PlaylistEditorUltimate format.
You would need this conversion if you want to retain you custom playlists when upgrading from BeatSaber 1.13 (BFBM 1.13 and PlaylistEditorPro) to newer version of BeatSaber 1.17+ (BFBM 1.14+ and PlaylistEditorUltimate).
node ./src/convert.js <path-to-backup-file-for-converion>
e.g.
node ./src/convert.js C:\VR\PlaylistEditorPro\2021-11-01_081358.json
This will create new file 2021-11-01_081358-PEU.json
in the current working directory with converted backup. This file needs to be moved to folder of PlaylistEditorUltimate and then it can be used to restore backed-up playlists.