Does anyone know if we have to register as a new customer on the new skinbio website?

http://reverseskinaging.com/index.html

I tried logging in to my existing account (been ordering for about 2 years) and it said the account wasn't found.

Yes, you will have to register again.

The new system is a different company and we cannot transfer the old data to the new system.

The new Volusion system is the highest rated shopping cart. There were many problems (and complaints about) with the old shopping cart. This is why we changed systems.