I have the exact same problem !
Alignement is ok. But at the end of reconstruction, it seems to freeze about 95% and 100%. I have checked the Temp directory. No file created since a few hours.
So, i delete the temp directory and launch again the reconstruction. Sometime, it works. Sometime, not.
It is a problem i had never know with previous versions (1.3 and before).
I have only 600 images (20 mo each) so it is not a big project.
In the past, i made projects with 1000 ~ 1500 or more photos without this bug except the long time for the reconstruction but it was logical.
It seems to be a new bug of the 1.4 version.