Originally Posted by meme
Not sure if that's just for fun - or if you think its not doing something it should? If its your initial Save, and you've never given it a filename, how is it supposed to guess what filename you want?
Sigil does or should know the file name. It's the same as the loaded file with an epub extension. Every other version has worked properly.
On the initial save the file name window is empty.
Is your response just for fun?