The backup function works this way. After the receiving of the search results in the edit window our program have backup already in the memory about all editable string values which are in the edit window, such as artist name, title, year, genre, album, comments, track number, what tags (ID3v1, ID3v2 or both) are in mp3 files exist, paths to the files and the file names. If the user erased the single or all tags, he has the option to restore the data from the backup loaded with all files initially.
