Infinity Blade content won't show up in editor

Downloaded GBs of data for pack, the folders are there in the project but the asset files are not showing! They are there
on my computer when I check in file finder. What am I doing wrong ? Don’t have this problem with other packs. I’m new but this should work. I’m missing something here, what I’m supposed to do? It says it’s compatible with 4.25. Any help appreciated.

elaborate please

Material is physically on my computer hard drive, props, meshes etc.in the infinity folder. In the Content Window the appropriate folders are there for infinity assets but all the folders are empty ! In reading posts, it sounds like these item have not been “sanctioned” or “cleared” by Epic for my version of Unreal 4.35. The common response to that is, “put them into an older version then transfer items.”
Do you think that is what is going on ? You can run two different versions of unreal on the same computer without causing confusion and problems ? Is that what they mean ? Just copy and paste item from older version Content to my current version Content window. I don’t want to screw the program up on my computer as other than this it is running just fine. Thanks for any light you can shed on this. Bob

Material is physically on my computer hard drive, props, meshes etc.in the infinity folder. In the Content Window the appropriate folders are there for infinity assets but all the folders are empty ! In reading posts, it sounds like these item have not been “sanctioned” or “cleared” by Epic for my version of Unreal 4.35. The common response to that is, “put them into an older version then transfer items.”
Do you think that is what is going on ? You can run two different versions of unreal on the same computer without causing confusion and problems ? Is that what they mean ? Just copy and paste item from older version Content to my current version Content window. I don’t want to screw the program up on my computer as other than this it is running just fine. Thanks for any light you can shed on this. Bob