Thanks your info. HOWEVER, I wouldn’t update to the latest Filmpack version, without Filmpack pop up window: here is the latest version, please update. It was a definitive request from DxO.
By the way I did open FP v5 from PS CS6 as a plugin only. Without update FP v5 it was working, because I intended to add frame to a layer image. After applied the effect, step out from PS -> update FP v184.108.40.2065. For test only start FP, which was not functional. OK. I went to the latest PL v3.3 Windows 7 compatible app and the built in FP part was perfectly functional. It means for me, the PL embedded FP is independent from FP standalone and did not updated by the latest FP version.
The reason I did start my Win 7 version is simple. My Win 10 PC is in the service station, because its power supply went wrong. Win 7 is an emergency machine on my table, let me keep contact with the world.
Return to the original post, I think DxO have to change something in the FP warning system. Actually the message mislead the user.