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If you just want to update tags, you should use Akarin's Tag Updater! His script is better, faster and works on modern lists

This example is everything you need to understand how this script works: http://imgur.com/a/Ci12t

This script
• will update and save all your tags.
• can update 2 tags per second.
• can sort every column, yes also tags! (this will disable the "more"-button)
=> If you want to sort your columns, first click the tagheader. You will notice that the "more"-button disappears. Your list is now sortable, click any header to sort that column.
• will probably not work with custom lists :(

Series information options that you can add to the tag column:
• English name
• Japanese name
• Synonyms

• Score
• Ranked
• Popularity
• Members
• Favorites
• Type
• Status
• Genres
• Episodes / Chapters or Volumes
• Aired / Published

[anime only]
• Season
• Broadcast (JST)
• Duration
• Producers
• Licensors
• Studios
• Rating
• Source

[manga only]
• Authors
• Serialization

And also a clear all tags option.