why not.
I have gone through the same process.
It worked for me.
try this
How to Activate KIS/KAV 2010 using Key files:
Here is pictorial shots on how to activate your KIS/KAV 2010 v.9.0.0.459 using key file. [ you already know how to activate KIS/KAV 2009):
Note:*** Please keep the internet connection off *** :
Please chose for activate license and follow the step wise pictorial shots for activation:
Step-1. Chose the option " Activate trial License" and click "Next" button as shown in below picture
Step-2. you will get the error message as shown in below picture. Here click on "OK" button.
Step-3. Now you will get this below window. Here click on browse button to select for the valid key where you have saved it.
step-4. Now you have browsed for the valid key and selected it for activation as shown in below picture. Now click on Next button>
Step-5. Your key has been successfully installed. enjoy. ( if not then select for another valid key with the same process).
DONE!