Can I play in full-screen?
yes, press ALT GR + ENTER

How can I use the chars that have grey portraits in selection screen?
You can't. That chars are unavaible yet, or they are avaible only for patrons and contributors.

How can I import/export chars?
No... the only way to import chars is install the last patch (if avaible) or the last beta. The HokutoProject chars are incompatible with a standard Mugen system and if an external char is installed into HNK Mugen the only result is a program crash!

Some implemented features require special code/states/anims that aren't provide in standard Mugen/chars.

Why the project is crypted?
Because in the past some guys have try to steal our work...