pgAdmin 4 beta not working on Windows 10

Dave Page schrieb am 10.06.2016 um 16:48:
> I'm pleased to announce that the release of pgAdmin 4 v1.0 Beta 1 for
> testing. You can find more details on the website:
>
> Announcement: https://www.pgadmin.org/
>
> Documentation: https://www.pgadmin.org/docs4/dev/index.html
>
> Downloads: https://www.pgadmin.org/download/
>
> Bug tracker: https://redmine.postgresql.org/projects/pgadmin4/issues
> (requires a PostgreSQL community login)
>

I don't have a community login, so I'm posting that here:

On Windows 10 64bit it doesn't start.

When running pgadmin4.exe I get a dialog

"Fatal Error"
An Error occurred initialising the application server:
Failed to launche the application server, server thread exiting.

Then it prompts me for a "Python Path" and an "Application Path".

I pointed that to

c:\Program Files (x86)\pgAdmin 4\v1\runtime\python27.dll
and
c:\Program Files (x86)\pgAdmin 4\v1\runtime\pgAdmin4.exe

but after that, nothing happens.