I forgot to include my order number in the post above.

Here it is:

ARTIO E-Store Purchase Order - 22983

Hi,

When I purchased joomsef 4 I accidently registered my site as

mydomain.com

instead I should have registered the following:
www.mydomain.com

I thought mydomain.com is the same as www.mydomain.com

NOW, i get the following error when I login to my JOOMLA ADMIN and then go to COMPONENTS->JOOMSEF->UPGRADE.

HERE is what the message says:

"Your domain doesn't match the one registered during purchase. Please make sure that you are accessing your administration area from the registered domain. You will obtain the non-paid version of JoomSEF when launching upgrade from ARTIO Server."

What shoul i do?

I need my site to have "www" in front of my domain

when i said "stopped working" I meant to say i get "page not found".

Do i need to buy ext_joomsef4_community.zip
for extra $10 in addition to what I have already paid for JoomSEF 4 ???

I installed joomsef 4 succesfully but for some reason my jomSocial extension stopped working.

Are there any known issues that I'm not aware of?

How do I go about trouble shooting this problem?