I had gotten the free DLC when it first came out and now I don't have it. Is there a way to get it back without purchasing it again?
You got it from PS+ right?
If so, you're PS+ sub probably ran out. You can regain access by buying a year pass for PS+.
and if you didn't get it with ps+ or you did but your PS+ has not expired you can just go to your downloads, scroll back to the time you DL them, then re-DL/re-install it.
Did you have to do a system restore or something recently or did your PS+ expire?
I did that the other day but the DLC didn't appear. I had gotten the DLC last year so I don't know how to get it back now.
that shouldn't be. Here try this https://support.us.playstation.com/app/contact_opt
The DLC was only free to PS+ members for a limited time. Lot's of folks were on the limited "Free PS+ because we're sorry" thing at the time. When that free PS+ expired, so did their free DLC - gone, nowhere to be found. If you want it back, you have to pay for it.
Ignore me if this turns out to be unrelated to that experience.