for templates you need to unzip them first.  That will give you one .smp file and a folder with the same name for each template--keep them in same file/folder structure as they are.

open Animaytor, click project in top menu to load project and browse to find the project's .smp file and click on it to load.  the software will find the data it needs in the folder with same name and it will load the project.

for example, unzip (name is made up but process is same).  that will give you a file called BusinessTemplate.smp and a folder called BusinessTemplate.  to load this template open Animaytor and click Project in top menu then browse your computer for where you unzipped and find the file BusinessTemplate.smp and click on it to load it.

once you do that you can edit, save as a new project and then render as a new mp4