Purchased, deleted, can't re-download. – Pix: Pixel Mixer Review

I love this app, but I accidentally clicked on Facebook when trying to do something and now I can't get my pics sent to FB. I have tried signing out and back onto Facebook numerous times and I still can't get it back. I thought if I deleted Pix and reinstalled it, it would help the problem. But I couldn't download it again, as it says that it's already installed. Very frustrating! I would rate it five stars if I could get it back and send pics to Facebook.
Review by Jude246 on Pix: Pixel Mixer.