Step 1: Log into WordPress admin dashboard.
Step 2: Navigate to Plugins > Add new from the left pane.
Step 3: Search and install the “WP Reset – Most Advanced WordPress Reset Tool” plugin.
Step 4: Once the plugin is activated, click Tools > WP Reset.
Step 5: Switch to the Tools tab.
Step 6: Scroll down to the Reset Theme Options section.
Step 7: Click Reset Theme options and then click once again in the pop-up.