While inside of a Google Chrome browser, you can press Ctrl+Shift+Delete at the same time to bring up the "Clear browsing data" menu. You will want to select the "Advanced" tab near the top right of this menu (shown circled below). The time range at the top should be "All time". At minimum, you want to make sure your "Cookies and other site data" and "Cached images and files" are both selected, but it is usually a good idea to have the top 4 boxes and Site Settings checked. Finally, hit the blue "Clear data" and restart the browser.