Updating application with new certificate

[breakpoint]

Hi

To make a long story short: I have developed an application for a company and I was about to update when I discovered that in the member center area on the Apple website the Development Certificate was gone, as well as the devices and other stuff, so I made a new one and uploaded the device ID again.

So everything okay...I thought. I opened iTunes and downloaded the new provisioning profile and dragged it over to the organizer window. But it did not work. I got several different warning and errors saying the the keys, certificates etc did not match, so I Googled. I saw some posts that said: try making a new distrubution certificate...so I did, then xcode told me that I had to many certificates for that app so I exported the certificates by right clicking the selected certificates in the keychain and tapped export. I ended up with a Certificates.cer file. Then I deleted those certificates to make room for the new ones i downloaded from the member center portal.

SO now I do not know what I have done...I am afraid that I screwed something really up.

My question is: I really hope it is still possible to update the application already in appstore even though I have to recreate the certficates, provisioning profiles etc.

Best regards