wait until the free weekend is over, then sync.

in the future, sync before the free weekend starts and you won't have any problems...

Time travel 3 days in the future. Problem solved.

did you try to search in steam store?

It can last for upto 2 weeks I've heard as a worse case, just takes regular syncing and hoping.

Following demodash's advice works too for the future.

Did you try turning it off then back on?

just add new game and sync

I once heard, that it should help if you put those games on your wishlist. Haven't tried it though.

I JUST FIGURED OUT!!!! The new store has a button just below the game videos (in the shop page of each game) Dissmiss, if you mark this button on each game you gonna release it from your library!!!!!!!

But where is this button exactly? Because I can't see it and I have the same problem.

SOrry all. My steam is in my native language so I supposed wrong the name of the button.

The real name of the button is:

NOT INTERESTED

just bellow the pictures and videos of the game.

No, doesn't work for me. Still says game is in my library and can't enter..

add new game and sync again
http://www.steamgifts.com/forum/uJF5d/sync-account-free-weekend-games-solved

Ok thanks it's good now :)

For me wasn't necessary to add any comunnity. ONly you need to do is re-sync your Steamgifts account after click not interested in steam.