No relaunch after patch

[gyroido]

I downloaded/installed the new patch today, and when I clicked the Relaunch button afterwards, the window disappeared and the game didn't start again in a new one.

(Oh, and there was something I don't think I've seen before about checksums not corresponding in the patch progress window, so maybe that's related?)

Any ideas what I might have to do to play Ryzom again?