For Android user , delete .ink files easily . Step 1 ) You need rooted device . Step 2) You need SD Maid pro (root) . Step 3 ) Download nd install nd open sd maid pro . Step 4 ) Open Sd maid go to Explorer . Step 5) now you will see all folders nd files in memory card just select .ink files nd delete . Thats all :)
Note: The fix in the above link requires Windows Registry editing. Always make a backup of the Windows Registry before you modify any settings. For steps on how to backup Windows Registry check this: http://support.microsoft.com/kb/136393.