Finally

src/Components/Modules/Party.cpp

@@ -93,10 +93,6 @@ namespace Components
 		Party::LobbyMap[id.Bits] = Party::Container.Target;
 
 		Game::Steam_JoinLobby(id, 0);
-
-		// Callback not registered on first try
-		// TODO: Fix :D
-		if (Party::LobbyMap.size() <= 1) Game::Steam_JoinLobby(id, 0);
 	}
 
 	void Party::PlaylistError(std::string error)

src/Steam/Interfaces/SteamUser.cpp

@@ -97,6 +97,6 @@ namespace Steam
 
 	unsigned int User::UserHasLicenseForApp(SteamID steamID, unsigned int appID)
 	{
-		return 1;
+		return 0;
 	}
 }

src/Steam/Steam.cpp

@@ -12,8 +12,8 @@ namespace Steam
 
 	uint64_t Callbacks::RegisterCall()
 	{
-		Callbacks::Calls[Callbacks::CallID] = false;
-		return Callbacks::CallID++;
+		Callbacks::Calls[++Callbacks::CallID] = false;
+		return Callbacks::CallID;
 	}
 
 	void Callbacks::RegisterCallback(Callbacks::Base* handler, int callback)