Here are the lists of supported file types for the following Melco products:
Melco OS - File Types to Open, or Save As...
Bravo OS opens same file types as Melco OS.
DesignShop v10 - File Types to Open
DesignShop v10 - File Types to Save As...
NOTE: Wilcom (.EMB) files are supported but they have to be saved within the Wilcom software as Version 1.8 (or sometimes earlier) to be compatible. Wilcom incorporated a proprietary encryption within their current file formats which prohibits newer .EMB files from being read by Melco OS, Bravo OS or DesignShop.
Additionally...this 3rd Party website defines Various embroidery file types.