Manually install aspell dictionary

Hi

I’m writing behind a proxy and want to install a german aspell dictionary. How can I manually install one?

Regards,
Oliver

PS: I was able to generate an .rws from a word list with

C:\Program Files\Scrivener\Aspell>bin\aspell.exe --lang=de create master "c:\Program Files\Scrivener\Aspell\dict\german.rws" < "C:\Program Files\Scrivener\Aspell\dict\german.dic"

and added the file de_DE.multi pointing to the rws file to the dict subdirectory but Scrivener couldn’t find it and didn’t list the german dictionary in the settings.