Known2_64.met
Stores AICH hashes of all downloaded and / or shared files. If you delete this file, eMule will have to rehash all files on the next restart. If you don't want eMule to remember downloaded files, disable the "Remember downloaded files" option in the preferences.
Known2_64.met 储存所有下载过的和共享过的文件的哈希值。
直接删除， emule也会在下次启动时重新生成。
和上传统计、积分没有关系，不是啥大问题
