Forum:All Items Map, help?

I tried to download the 'All Items' Map, and when I clicked on the file (in my terraria worlds folder) it opened with Adobe and it said that Adobe couldn't open it. When I searched around on the comments (on the map info thingy), some other people said to try reinstalling terraria because that's how they got it to work. Well, I don't know how to do that. Is there something on steam that lets you do that?

Thank you!