For test purposes, we highly recommend you install the app on an unpublished theme to avoid any unexpected results on your live theme.
Steps to manage
1. From the app admin page, click Settings > Publish to theme
2. In the pop up, select the theme you want to show the quote function. 
3. Click Save
4. Preview the theme you’ve selected to check the result
If the app is installed to live theme, please check the live website.
If you don’t see the Add to quote button showing, please email us at apps@globosoftware.net. We are happy to help!
In case you have technical knowledge, please try this guide.