You are not able to login to app.loopyloyalty.com with your old Loopy Loyalty credentials.
Because app.loopyloyalty.com is a completely new application, with many many more features, we don't currently have a way of transferring old loopy loyalty accounts to this brand new application.
Please create your new account at app.loopyloyalty.com. You can still use the same email address but we can't currently migrate your card designs from the old application to the new one.
Once you have a created a new account you will find it even easier to create and promote your new digital loyalty cards. You can view the Quick Start Guide here: http://docs.loopyloyalty.com/getting-started/quick-start-guide
P.S. To login to your old Loopy Loyalty account please visit https://loopyloyalty.com/dashboard/