User blog comment:Dragonjet/KC3改/@comment-201.79.75.242-20151105204602/@comment-1820055-20151106231651

There is no CG replacer built-in on KC3改 and no officially confirmed third-party tool that will work with it.

The currently popular replacers are KanColleCacher for KCV and ShimakazeGo that might work for other viewers, iirc for Poi - but untested for KC3改. if you want you might wanna try it to be the first one to confirm it.