Add single page pdf to agreement

i was using the free trial of adobe sign for 30 days and it worked to my likeing and was easy. now that i have paid for the service, the interface is different and i cant seem to do what i did previously. 

i send my clients a 2 page agreement prior to every one of my jobs. with the trial, i was able to add a single page pdf (an invoice) when using the template prior to sending for signature. 

after im a paid customer, everything is in a different place, the templates are "unsupported" and i had to rereate them all and now i cant add the invoice prior to sending the agreement. Super frustrated at this product. im coming from DocuSign. I think its garbage so far. Its so simple what i need, yet so difficult to seem to create.