Others have already mentioned the folder location, so I will mention which files (and subfolders) to copy:
· You should copy the Players
subfolders. If you want to copy your screenshots, go ahead and copy Captures
, but this is not strictly necessary.
should be copied if you want to carry over your acievements. servers.dat
isn't necessary (only stores server history, nothing more). The same holds for favorites.json
- only stores your starred worlds and characters - make sure you copy your characters and worlds.
should NOT be copied. I messed up a migration of my installation because I copied it along (although I moved from WINE to Linux, so it might be different for Windows 7 → Windows 10).
There's little reason the config.json file shouldn't work just fine on the target computer outside any OS or file system specifics that may mess up a file, it is just a text file with no form of encoding or encryption. Windows -> Windows should be completely safe. Of course, if you take the config from a newer version and try to use it with an older version that may cause issues as well.
The settings that I can see could cause issues would be DisplayWidth/Height, ClientUUID and CloudSavingDefault.