I recently started playing Skyrim again & I had noticed a sword I was using is gone. So I went to open the Creation Kit & each time I try to load up dawnguard I get an Error and it want me to retry abort or ignore the error.

here is a picture of what it tells me exactly.

http://i76.photobucket.com/albums/j10/ultimaomegacloud/ErrorwithCreationKit_zps19d09168.jpg

an error about the string files, do i get that right? if so, you likely extracted the strings from the bsa, ck doesn't like that. easiest fix is to delete data\strings folder and let steam validate you a new one