1) Go to Admin > Apps > Jewelry Solutions.
2) Go to the bottom of the settings page, find the section called Safe app removal, and follow the instructions.
After follow these steps, you are safe to remove the app, and your will avoid any layout misconfiguration in your store.
If you removed the app without a safe removal, following the steps above, and your store layout is not working properly, reinstall the app, then follow the steps 1 and 2.
If you still need help to remove the app, please contact us here, and we will do it for free.