Startup is not free to use.
We’ve got a demo version of Startup product.
In demo version you able to use all functions of Startup – change fonts, colors, set animations, preview your project and export your template. The only restriction of demo version is a number of available blocks – you’re able to use only 2 first blocks from the each category.
You also need to be registered on designmodo.com and be signed in your account.
You can try demo in Generator app: https://designmodo.com/startup/app/