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Hello, the supporter edition has cumulative bonus content and features. As of version 0.45.2, supporters get 3 bonus animations and 14 bonus illustrations in the game. This will increase with every new major version release. To read more about the differences between the editions, I recommend you visit the patreon, linked in the post here.

Oh, that's the animation-only gallery. It's only available in the supporter edition of the game, not the public edition. 

Submit a bug report in the help thread of the discord, someone will help you. 

It's in the computer mode, in Naruto's room

Join the free discord and ask in the help channel, someone will help you. 

You can't, versions older than 0.43 were on an earlier engine (RPGM MV) so those save files are not transferable.

Join the discord server and post the details of your issue in the help channel.