Since yesterday, I restart my computer. Use WD10, try again Designer Pro9... and Designer Pro 9 launch without any message.

I don't know why, but problem seem's to be solved.

Maybe I should'nt have launched Designer Pro 9 just after updating WD10 ?
I shouldn't have panicked, but I was in a hurry.

Everything works fine now.
Sorry for the useless tread (maybe admin can suppress it)