I tried the method you suggested, but it didn’t work. (removed and reinstalled by “add/remove” from LINUX Ubuntu)
Thank you iliketosayblah, anyway.
Is there any other way to solve this problem?
Well if the blend file is corrupted, you could try to Append (Shift F1) your objects one by one into a new blend file, saving after each one, to try to retrieve as much as you can from the file.
I found out that even adding a curve causes a crash. (But I can add a metaball or a cube successfully.)
Maybe it crashes whenever Blender consumes too much CPU suddenly.
Is it possible? If so, what can I do with that? Upgrade my computer hardware?