Updated itunes, now it freezes upon opening. even after reinstall.

Hey, I recently updated to the newest version of itunes and whenever i open it it freezes automatically. It pops up and i can't click on anything or do anything.
I've tried reinstalling it and redownloading it multiple times but I still get the same results. I've also made sure to download the one with quicktime.
I tried downloading an older version but it says that my library was created by a newer version and it can't be read. Something along those lines.

Can someone please help me? I'm at my wits end about what to do.