Yes, I have the newest Java installed and I have downloaded the addon. That's why it doesn't make too much sense that I am receiving a "To view this web content, you need to install the Java Runtime Environment" error.
After almost 4 moths My Addon its working. That 3rd time when I got that problem (Which still I dont know what it was - for sure not W10 and not NORTON ANTIVIR) - 2 times I fixed it by formating C: (#@%^$##@!%@%) and reinstal Windows. Third time - for almost 4 moths I DID NOTHING (You know how "pain in the ass" its formating PC...) - and I just look at the forums now and I think to myself - "well lest try to download it again and try to run it" - and its WORKING like nothing happend!!!