In the Opera browser, you can delete the cache quite easily. Follow this step by step guide to find the options.

1. Using the keyboard-shortcut
  1. Press the keys [shift] + [cmd] + [del].
  2. The settings open in the browser window within a popup window. In the drop-down menu at the top of the popup, you can select which time range you want to delete the cache for. You can select from the following options: past hour, past day, past week, last 4 weeks, the beginning of time. If you want to delete all the cache data select "the beginning of time".
  3. Enable the checkbox "Cached images and files".
  4. Click on the button "Clear Browsing data" and reload the website.
2. Through the main menu
  1. Click on "Opera" in the main menu.
  2. Select "Clear Browsing Data..."
  3. The popup window from the first instruction opens. Follow those instructions from step 2 onwards.

3. On the browser preferences page

  1. Click in the mainmenu at "Opera" and then on "Preferences"
  2. The Preferences open in a new window.
  3. Select the item "Privacy and Security".
  4. You'll find the title "Privacy" and below it the button "Clear Browsing Data...".
  5. After clicking the popup window from the first instruction opens. Follow those instructions from step 2 onwards.