Stuck at "Scanning for new files"

I opened a library file, when EagleFiler started scanning for new files and would not stop. I tried to quit it but it kept saying the library is in the process or something. Two screenshots are attached. I would appreciate any help. Thanks!

SL

You can click on the spinning progress indicator or choose Window > Activity to open the Activity window. This will let you see what EagleFiler is doing, and you can click the “x” buttons to make it stop.

Thank you, Michael! It worked. By the way, did I do something wrong that makes it stuck like that?

SL

Probably not—it shouldn’t get stuck. Does this happen every time you open that library?

No, not at all. It was the first time. I will report it if it happens again.

Thanks,
SL