I reorganized mu references today . And another bug was found again! All of my reference folders display double. And I thought I made some mistake to duplicated them. All references in these folders seems exactly the same. So I deleted few folders. After that, I told my self maybe its the bug of Zotero. So I closed zotero and reopened it. Ok, all of my references are not elsewhere classified. My god. I will have to take another day to classify them. So, can anyone tell me is there a way to recover my library? If not, CAN YOU FIX THE BUG?