Library disappears

For the second time in 4 weeks a library of mine just disappeared.  Although I didn’t notice it, it seems like EndNote was closed unsafely and when I opened the program again the library is gone (the data folder is still there).

I did find a procedure on the forum to restore the library, which did work, i.e. the library records do re-appear.  However, the file shows a size of 0 KB. 

  1. Should I be concerned?

  2. Any idea why the library keeps disappearing?