Hello Captain Sim Team.
So, three weeks after posting my issue (one which makes the 777 unusable), you simply posted a link to a small list of standard procedures to fix issues, all of which I had already tried, as I clearly mentioned in my post.

Quite disappointing. This forum insists all the time to read first, then post. Perhaps you guys should practice what you preach.

Meanwhile, the 777 remains useless. Guess I'll uninstall. Just wish I hadn't wasted the money.

If you have any real advice, please share.
Best regards