I've just played 30-40 hours with the Trial version offered until 2019.12.18.
Saved the game.
Today I've bought the Deluxe edition advertised at Uplay.

1. Why do I have to re-download and re-install the WHOLE 30 Gigabyte, if most of those files are probably there on my HDD?
2. How do I keep playing with that SAVED game I've started at the Trial ?
   (When I start the Trial > it asks for a CODE.)

... Right now in this minute while I was typing this msg here >>
Uplay just closed itself at ca. 50% of the download.
I've restarted it again >> and it said:
- the program has quit because no activity. Since when is downloading + installing = "no activity" ?
Now I have to re-login... but it does not remember my credentials!
(YES, "remember me" was checked before, and I've just did the whole hassle of the "two-way security authentication process... ) I start to feel it was a big mistake to buy a game from this company. ... At least the download continues from 18/30Gb.