I got peoblems with my sights

I want to download a sight from War Thunder Live, but when i enter the game, it doesn’t let me use it.
I created a file called “UserSights” and inside of it another one called “all_tanks” where i put the downloaded files of the sights, i checked and the sight i downloaded is able to be used in every tank. But when i joined the game again, in the section “Common Battle Settings” the selector of sights doesn’t appears, so it doesn’t let me use the sight i downloaded.
What can i do? i requested help in Gaijing support but the snail just told me to ask for help here.

You dont create the file, the game should have it in its files not sure where it would be though, since I haven’t played on PC in over 2 years