Hello,
can someone explain to me why the version i have downloaded in july 2017 was the 2.1.0.8, and now i got the 1.0_(18584) ?

File detail :

setup_race_driver_grid_1.0_(18584) = 2.35 Mo
setup_race_driver_grid_1.0_(18584)-1.bin = 3.99 Go
setup_race_driver_grid_1.0_(18584)-2.bin = 2.01 Go

setup_race_driver_grid_2.1.0.8 = 24.2 Mo
setup_race_driver_grid_2.1.0.8-1.bin = 3.9 Go
setup_race_driver_grid_2.1.0.8-2.bin = 1.45 Go

Every now and then GOG changes their versioning convention. Just like that. -_-

Most probably it's the same game version as it was back then, because it's not for sale anymore for quite a while.