Hi, If you're looking for a client side solution, in IE9 you should be able to use F12 to open the Developer tools and select the Cache menu option to "Always refresh from server".
If you're looking for a server side solution the following article may help you.
Right now, the reset is woking and we do not want the app to misbehave as executives are meeting this week.
Will let you know somethin more once we are able to resume testing.
Check to make sure you don't already have IE9 listed because it could be a partial or failed or corrupt installation.