For Scripts Planner to works, you need to active license first.
After the license is activated by pasting the license into the input field and press the Activate License button you will be automatically redirected to the Scripts page.
The scripts page is using a familiar WordPress look, feel, and logic. That's why you will not have a learning curve to use this plugin.
Press Add New button same as when you creating any post or page.
In case you want to check licence status go back to Scripts Planner > License and look for status badge.