@chrisr -- I reported same to Bitdefender - , but after install just send the small jrdisc.dll file to them from the JR program file directory. Tickets take time and if a lot of people send the same file.
In the mean time set up an exclusion rule in the JR 19 program directory via BD. And Ignore the warning on download; put BD off for 5 minutes -- install and you'll be ok (until the next patch if BD doesn't get their act together soon).