Crash after closing score

Windows Xp SP3, 1GB RAM, AMD Sempron 3000+, 2GHz,
Setup changes : start empty, working folder and Fluid sounfont
I did uninstalling musescore 0.9.6.1, cleaning Xp's registry, temp files, application data, checked no remains of muscore were there or in program files. I did some cleaning in my PC, antivirus checking, defrag etc... Reboot... Killed all unecessary process. I re-installed it. Opened the same file I sent you, closed it (with the red cross button)... And it worked, no problem...
... But only one time : I did it again and it crashed ?*° !
I checked if some ".mscz," remaining temporary files was the cause : no. Reseting the preferences to default had no effect.
I tried on another PC under XP SP3 (512 GB RAM, Mobile AMD Sempron 3000+), re-downloaded and installed version 0.9.6.1 ... same behavior : crash on closing with cross and with Ctrl-W. It happens that some files sometime crash on closing and sometimes not (It often crash on the first try and not after re-opening), but this file, only behaved normaly one time, as I mentionned, and some others crash every time.
All made under 0.9.5 initialy.
I've just noticed I even have the problem with the fixed file "lasconic" sent me (Thanks) in reply of my other tread "Kind of barlines appear everywhere" but not with the initial messed up file I sent !
Changing the language from system (Français) to English, the problem disapeared on this file, even when returning to "system" (Français) but not for the one that definitely crash.
I have the feeling that it's some temp or config or memory file that cause the problem, but I don't know what is where in musescore, it always remembers my preferences when I uninstall it and clean everything I find.