How to delete old DotA 2 item builds created before the guide system?

Solution 1:

The easy way to work around the Steam cloud sync for these files is not to delete them, but to make DotA2 ignore them. All you need to do is delete the contents, but leave the files.

Here are the needed steps:

  1. Exit Steam
  2. Go to your \Steam\userdata\XXX\570\remote\itembuilds directory
  3. For each .txt file there, open the file in notepad, delete the contents and then save and close
  4. Restart Steam
  5. If the Cloud Sync Conflict dialog appears, just click local files - upload to the steam cloud

Now your ancient builds should no longer show up on the in-game UI!