The site http://www.debrugvideo.nl is actually not hosted by us here at WordPress.com, it's a self-hosted WordPress installation running on the WordPress.org software.

To clear up any confusion, WordPress.com and WordPress.org are two different entities.
http://support.wordpress.com/com-vs-org/

You've reached support for the free sites hosted at WordPress.com.

If you've lost the password for your self-hosted site, you'll need to try one of these solutions:
http://codex.wordpress.org/Resetting_Your_Password

If you need further assistance, WordPress.org has a complete support site for self-hosted/installed versions of WordPress at:
http://wordpress.org/support/

Best of luck to you!

Thanks for your help.
Let me explain something. I am 75 years old and in my active life a software developer. But the internet was always some diffuse for me.
Let me explain the problem. I maintain the website http://www.debrugvideo.nl. To reach the dashboard my login name was admin and the password [password redacted] .
Last week suddenly the password won’t work anymore. I have tried to reset the password, but the e-mail address in the profile is obsolete. So the answer for a new password never reached me.
The old and inactive e-mail address in my profile is [email redacted].
It should be my new e-mail address: [email redacted].
Are you able to change the e-mail address and give me a new password?

Thank you in advance,
Martin van der Reijden

http://wordpress.com/#!/settings/

You'll receive an email at the new address - please click the confirmation message you get to complete the process.

You should also change the address in your administration area under Settings > General:

https://mvdreijden.wordpress.com/wp-admin/options-general.php

You'll get a second email confirmation to complete for this change.

Let me know if you need further help.