I used to purchase games from Gamefly/D2D going back now sometime around 2011. I still have Rainbow Six Vegas 2 from back then still installed on my own old Windows 7 machine which works fine. However I have since upgraded to Windows 10 (on seperate SSD). When I try to play it comes up 'Direct 2 Drive' and asks for the serial key. I no longer have the key, it's not like steam where I can get it or redownload the game as the old Gamefly portal where I originally downloaded it from no longer exists. So each time I play I have to annoyingly open my PC disconnect my W10 SSD & connect the W7 one. Any ideas on what I can do?
https://store.steampowered.com/app/15120/Tom_Clancys_Rainbow_Six_Vegas_2/ It's currently just over two quid on Steam, it may be worth just picking it up again tbh.