Grasshopper-DIVA license

Hey folks,

I have an issue with DIVA license. It does not function due to the following message:

"License not found.
LM-X Error: (Internal: 844 Feature: diva-grasshopper)

(Err: 9) Feature not found"

I have taken several measures. I reached out to DIVA and got the latest license and installed it. did not work. I removed and re-installed DIVA 4, did not work either, let alone re-starting Rhino and computer several times. Any thought would be appreciated.