Lillesort131: Others have already mentioned the folder location, so I will mention which files (and subfolders) to copy:
· You should copy the
Players and
Worlds subfolders. If you want to copy your screenshots, go ahead and copy
Captures, but this is not strictly necessary.
·
achievements.dat 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.
·
config.json 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.