licesnce key window wont open after paying for Avast

I paid the money but after I click “I already have a registration key” the window appears at the bottom (like you reduced the window down to the bottom bar) and wont open to let you enter the key, why? now I am unprotected andd avast has my money. I am tunning a windows 64bit vista on an HP Pavillion dv7. any help would be great.

What happens if you run ashavast.exe from avast folder?
Can’t you open the window and add the key?