Calibre 2.0 Crashing at start up

Hello

Sorry for my english, I'm french.

I installed the new version of caliber. I have a problem with cons. Every time I start the program, there is an error message. (no problem with the old version)
I've uninstalled everything, cleaned the directory and did a clean install is the same every time.

The program has an error with the qt5core.dll

I'm still using windows xp

If you have an idea, I'm interested.

thank you

:)