Wrong Authorisation after a couple of flights

[Hoshou]

Hello,

I have had the same problem since I had to reinstall FSP for FS9 under Win 7 64 bits. I applied the solutions mentionned above and it worked for a few
flights.

But the same frustrating "wrong authorisation" bug came back lately and I can't understand why as I haven't changed anything in FSP's installation.

Regards
Yann