turned out that sample interval was sometimes milliseconds instead of seconds, when downloading from Shearwater. Rainer fixed this on
divelogs.de side, so could you try the import to Subsurface again?
Importing your log did not cause a crash on my Linux machine, but some of the dives had interval wrong, resulting in extremely poor performance. So it might be that your import ran out of memory, and fix on
divelogs.de will suffice. Just let me know how it goes, and if you notice anything that could be improved on the import.