To delete the game file, do the following:

1. Select "View" from IE's toolbar (in IE 5, select Tools instead).
2. Click "Internet Options."
3. Select the "General" tab.
4. In the Temporary Internet Files section, click "Settings."
5. Click "View Objects."
6. Click on the file(s) you want to delete (Yahoo!7 Chess, for example).
7. Select "File" then "Remove Program File."
8. Select "Yes" to confirm.

If your browser is properly configured, a fresh copy of the game file will load automatically when you start the game.