Replace ThemeMii with updated version

[Xpl0itU]

This version fixes errors I had when trying to open mym files and has updated libs Source: https://github.com/Xpl0itU/ThemeMii

[larsenv]

Could you please provide more details?

[Xpl0itU]

When trying to open a mym file it gave me this error “1 is not a supported code page”, so I decided to get the source, update the zip module to a newer version and recompile it to x64, which made the issue go away