Hi Nergal,
That's exactly it : the files dispayed in the screenshot of CCleaner do NOT exist anymore on my machine. And yes, I also checked through the registry ...... to find .....nothing.
Furthermore, I also have FF and Cyberfox x64 installed and their plugins are correctly detected (~ displayed) in CCleaner.
Yesterday, I had the idea to do something (thankfully !) that I didn't do up to now : I opened Iron, deactivated both plugins (java & flash) and closed the browser. Then, I opened CCleaner to check the status of these plugins : both deactivated, as expected BUT ... see there : both were now displayed as they should ! (see screenshot)
So, there was obviously a lack of "communication" between CCleaner and Iron (some wrong informations still stuck in the "pipeline").
Sorry for the quite long explanation but I wanted to reproduce the procedure step by step as this could be useful to others ...
Anyway, thanks for your concern.