Yes, you can change the project you're working on at any time.
To change a project, go to the Track page and select Choose another project. Then, you will be presented with various projects based on the difficulty level: Easy, Medium, Hard, and Challenging.
Scroll down and click the project you're interested in. After that, click Select this project.
After choosing a new project, you'll be able to open it in IDE Edu in two ways:
- Within IDE Edu: init screen > File > Learn > Browse Courses > JetBrains Academy;
- From JetBrains Academy: press Solve in IDE button on the stage implementation page.