Aminifu It wasn't enabled, but wacup required me to restart when unticking it.
dro: Files are not removed through the playlist, but in Windows Explorer.
Play FileA from FolderA.
Play FileB from FolderB.
Try deleting FolderA → Fails until WACUP is closed. (Deletion is attempted while having FileB play, and also while it's stopped. Only closing or restarting wacup helps
Additionally: FileA can be deleted while running FileB. But empty FolderA can't be deleted unless wacup is closed or restarted.
I run wacup barebone. No visualization, timer, media library or anything fancy running.Even the equalizer window is closed