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Bang and Olufsen BT speaker BEOLIT15, looking for .psr file

Hello Everybody :)
I am looking for a Persistent Storage (.psr) file for Bang and Olufsen BT speaker BEOLIT15. 
The speaker is out of warranty and suffered a corruption during upgrade, which impaired that file. Without it - the speaker malfunctions. 
If anyone has a file like this he/she is willing to share - I would greatly appreciate it 
Thank you so much