v0.5.6 DefleMask legacy .dmp support

What’s megatoy?
megatoy is a full-featured YM2612/OPN2 patch editor for the Sega Genesis / Mega Drive. It’s designed for musicians, sound designers, and chiptune fans who want to craft and experiment with FM patches.

• Organize your patch library with built-in management tools.
• Import and export major instrument formats, including Furnace and DefleMask.
• Create new YM2612 sounds with Random, Mix, Morph, and Mutate tools.

What’s new in 0.5.6?
This update adds support for the older DefleMask DMP format (legacy header and layout), so vintage .dmp patches now load correctly.

You can try it right away in the Web build. Have fun, and let me know what you think!