In case you only have Explorer Standalone Edition; or just want to store the Test Case locally instead of submitting to qTest, you can follow below approach to save Test Case to Excel format:
To view and edit the Test Case information, users can click the Test Case Preview button on qTest Explorer Editor's toolbar or use the hotkey (Ctrl+P).
The Test Case Preview dialog will be displayed. You can modify the Test Case details here as needed.
Upon completing edits, users can save the test case information into a spreadsheet by clicking on the Save as Excel button. The Test Case will be save as Excel and open for reviewing