link location moved

I’m using MP3-jPlayer to present audio samples in a playlist. It was working fine in the beginning.
The wordpress installation is located in a subdirectory. When we made the page public and changed the link from “www.page.com/subfolder” to “www.page.com”, the playlists weren’t working anymore in the Frontend. They show “Can’t locate audio.”
In the backend the playlists are working fine.
I figured out that this only happens if I use ID’s from the media library. When I use direct track URLs it is working fine.
When I activated the debug info I saw that the URL in the [urls] array still had the old path, like “www.page.com/subfolder/wp-content/uploads/2016/04/01_audio.mp3”. This links with the subfolder in it aren’t working anymore, it must be without the subfolder.
Do you have any tipp what I could do to fix this?
Is it possible recreate the [urls] array?

On the following link you can see an example. The first player is made with track URLs and the second one with IDs.
http://www.teamwork17-12.de/produkt/betet-an-friends-of-jesus/

https://ww.wp.xz.cn/plugins/mp3-jplayer/