You can check the activation program to see if Foxit PDF IFilter has been licensed.
Here are the steps:
1) Run IFilterActivation.exe (C:Program FilesFoxit SoftwareFoxit PDF IFilterIFilterActivation.exe).
2) Check your license by the message shown on the activation program.
o The message "Thank you for using the Foxit PDF IFilter Licensed version." tells that your IFilter version has been licensed successfully.
o The message “You have X days left in your trials.” (X>=1) means that you are using a trial version of Foxit PDF iFilter. You can stay in evaluation or click “Activate” to activate your IFilter version with a code/key.
o The message “You have 0 days left in your trial.” means that your IFilter version is not a licensed one. You should activate it with a code/key to have your IFilter version worked.