Hello,
Thanks for using our theme.
1/ Enable Elementor editor for the Static blocks https://xstore.helpscoutdocs.com/article/47-static-blocks
After that go to Static Blocks and edit the Footer static block using Elementor. Go to Appearance > Widgets > Footer area > add Footer static block.
2/ XStore > Sales booster > Fake Sale Popup https://xstore.helpscoutdocs.com/article/110-sales-booster
Regards