You can restore Pearl Theme default settings using the GUI installer that contains the theme configurator.
In your browser go to www.yourmagentostore.com/pearl-theme-installation/ and follow the steps from the graphical interface.
SKIP the installation steps until you get to STEP 4 - Demo Import, STEP 5 - Theme Configurator and STEP 6 - Clear Cache.
SKIP installation steps ( step 1, 2, 3) :
RUN Step 4 - Import desired Demo settings and set demo homepage
RUN Step 5 - Theme Configurator
RUN STEP 6 - Clear Cache
Done! Settings are now restored to default!
NOTE: Changes done to CMS pages and blocks are not restored, once blocks and pages are created the theme installation and configuration do not overwrite existing pages and blocks in order to avoid overwriting by mistake any work in progress. If you need default pages and blocks, try installing the theme on a separate magneto installation and copy the default page/block code from there or reinstall the theme from scratch or access Pearl Theme DEMO STORE and copy the sample content from there to your Magento 2 installation.