Hi, I succesfuly added Musketeer DLC to my library but in game i still have Arbalest in my rooster. Bug or I did something wrong?

Set manually. From the library on the site
Launcher has not yet been updated.
Everyone has this problem

I'll try that, thanks.

Also, note that the Musketeer is not a simple skin replacement for the Arbalest; as I understand it, you can have both Arbalests and Musketeers in the same game, and while they have the same stats and skills the Musketeer's class-specific trinkets do slightly different things from the Arbalest's.

I did a quick check on the wiki, and it seems Musketeer trinkets are re-skins of the Arbalest trikets, providing the exact same bonus/malus.

Redhook describes the Musketeer as a reskin of the Arbalest since all of her abilities/base stats are identical. I don't know if any of the trinkets do anything different than the Arbalest's (I doubt it), but there are Musketeer-specific versions of each of the Arbalest trinkets. However, they count as separate heroes, a Musketeer appeared in my stage coach in the 3rd week and an Arbalest a week or two later. It's random draw as to whether you get one or not, but she'll eventually appear.

I looked at the discussion where I got the information; they were specifically talking about class specific trinkets from Color of Madness (which don't seem to be on the wiki yet) being different between the two.

Oh, I understand better now, I was speaking of pre-Color of Madnees Musketeer only ;)
While Musketeer was a backer exclusive, it was strictly equivalent to Arbalest.

Now that everyone has access to both, it might be a good idea indeed to bring some mechanical differences.