If you keep running into errors when you're trying to install ExportYourStore from the Chrome Web Store, you can try "sideloading" it instead. That means installing the extension manually, using its .crx installation file.
Warning: It's safe to install ExportYourStore manually because you'll be getting the extension files directly from us. In general, it's not a good idea to install extensions that you get from somewhere other than the Chrome Web Store.
Note: If you install ExportYourStore without going through the Chrome Web Store, you will not get updates automatically when we release them.
Install the extension manually
Download the zip file for the most recent release of ExportYourStore and extract it to a location you can find easily.
Type chrome://extensions in the address bar to open Chrome's Extensions page.
Enable Developer mode in the upper right corner of the page.
Click Load unpacked extension, browse to the location where you downloaded the file, and select the extracted folder.
Click Add extension when Chrome prompts you.