Wii U .app and .H3 files

[HueyLoisTheThird]

I'm trying to rip stuff from Lego Dimensions Wii U. the thing with that game though, is that a good chunk of the content is in the form of DLC. so I need to rip from that.

I know what to do with .dat files from TT games, but see, to get the DLC, I'm using Wii U USB helper. it's given me DLC, but it's all .app and .h3 files, which I don't know what to do with.

I've been googling and can't find any converter or anything for these files.

any help appreciated!