iBooks not opening

[iLive]

I've been using iBooks since the release of Mavericks, and it has worked as it should until today. Today, I added a PDF file that I had edited in Preview (added notes, and red lines to my own homework), and now it won't open! Whenever I attempt to open iBooks, it just says: "iBooks closed unexpectedly." and gives me the options to ignore, send to apple or try again.

It's quite frustrating because my files in iBooks is something I am using at my university and they include my important notes as well.

EDIT: I've installed Mavericks on top of Lion and not Developer Preview.

 

[iLive]

added picture of the problem

 

[iLive]

Guys? :S

 

[LV426]

I've been using iBooks since the release of Mavericks, and it has worked as it should until today. Today, I added a PDF file that I had edited in Preview (added notes, and red lines to my own homework), and now it won't open! Whenever I attempt to open iBooks, it just says: "iBooks closed unexpectedly." and gives me the options to ignore, send to apple or try again.

The first thing I would do is:
Quit iBooks. Open Finder, click Go on the menu, hold down the alt key so that you see the Library folder. Go there. Type iBooks in the search bar. In that folder you should see a list of your PDFs. Copy the suspect PDF somewhere then delete it from the iBooks folder. If that file was causing the problem, deleting it might let you open iBooks again.

 

[iLive]

The first thing I would do is:
Quit iBooks. Open Finder, click Go on the menu, hold down the alt key so that you see the Library folder. Go there. Type iBooks in the search bar. In that folder you should see a list of your PDFs. Copy the suspect PDF somewhere then delete it from the iBooks folder. If that file was causing the problem, deleting it might let you open iBooks again.

I am not sure why I didn't think of that... Thanks a lot, because it worked out.

This is for you: <'3