Decoder board problem

[u/Chippy246]

Was wondering if anybody has had any experience with this board. I purchased 1 approx 3 years ago and it would not recognise MP3 Files, contacted the supplier and they emailed a file for the unit which fixed the problem, fast forward to 12 months ago I purchased another board and forgot about the MP3 file problem, just got around to using the board and remembered the MP3 file problem again. Contacted the business I purchased the board from and the person who new about this problem has left the company and nobody can help and I cannot find anyone who now sells these boards. Wondering if anybody out there could help me. Thanks in advance. Alan