So my brother and I have L4D2 on each of our account. We play it on the same pc. I play the game with some subscription to the add-ons while my brother doesn't. When I run the game, it downloads the add-ons that I'm subscribed to, and the next time I run the game, it won't downloads the same add-ons again and so on. But when my brother runs the game, it didn't detects any subscription to the add-ons and didn't download any add-ons, which is right. But when it's my turn to play the game again (on my account) the game downloads the add-ons like it was the very first time. This happens constantly every single time my brother played L4D2 (the vanilla one) on his account. It turns out that my addons folder is empty if my brother played the game, but it's filled with my add-ons when I played it. Is that how the game works? If the game didn't detects any subscription to any add-ons on one account, the game just wipe the add-ons folder so another account with add-ons have to download the whole thing again?