Help using & hiding Play All button for music

I have no idea why it wouldn't auto-hide outside the specified (sub)folder(s). This exact code works for me...

Not sure, try playing with @hide:!type=grp:Music (instead of path check)

In your current button, simply replace the existing ContextMenu Open with "%ProgramFiles(x86)%\Windows Media Player\wmplayer.exe" {allfilepath$}