The 2011 version of the playlist is in the path C:\ProgramData\kuwo\ModuleData\ModPlayList in the c drive.

The old version of the playlist is placed in the installation directory, which is the playlist folder.

If you install it newly, it seems that your original playlist will not be automatically imported into Kuwo because its path has been changed. (At least not mine)

If you backed up the original playlist folder playlist, you only need to copy all the files in the folder to the new playlist folder. (It seems that if you uninstall and install during the update, the original playlist will be gone, but the playlist will not disappear if you overwrite the installation)

I hope this is the answer you want.