Modify BMP / Bitmap File

I need someone to remove the black background from this bitmap file, but IT'S CRITICAL THAT YOU DO NOT REMOVE THE WHITE FONT / TEXT IN THE CENTER OF THIS DESIGN. The BitMap file will be used to do embroidery on a shirt... The shirt will be BLACK in color... the Lines and TEXT of this BitMap file will be stitched onto the garment... so, the removal of the BLACK area should leave the WHITE TEXT (MURPHY)