To clear your Java cache in Windows:

1. Click Start > Control Panel.
2. Locate and double click the Java icon in the Control Panel.
3. Click Settings under Temporary Internet Files.
4. Click Delete Files.
5. Select all boxes and click OK on Delete Temporary Files window.
6. Click OK on Temporary Files Settings window.
7. Click OK to close the Java Control Panel.

To clear your Java cache in Mac OS X:

1. Double click your Mac hard drive.
2. Double click Applications.
3. Double click Utilities.
4. Double click Java Preferences.
5. Click the Network tab.
6. Click the Delete Files… button.
7. You are prompted to delete your temporary files for Java. Make sure all boxes are selected with check marks. Click OK.
8. Close the Java Preferences window.