Yes. If you are using Store Designer app and want to keep you current store look, you can do so.
You can also try the platform's design and go back to the Store Designer design by going to eBay Manage My Store page

There, you can see a list of all store designs:

Go to Store Homepage, open the drop down menu. Select the store design from the requested app.

After that, click on the Apply button and the store design will be set:

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