To import a previously exported project, click the From Exported Zip option under Add API Project.
Figure 1: Navigating to import a previously exported project
Click the Choose File button to choose the project from the location where it is saved and click OK after selecting the particular project.
Figure 2: Import Project dialog box to browse the exported project and import
An existing project can be exported using the Export API Projects 
button on the upper-right part of the screen; select the project that you want to export and click the Export button.
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