Hello Wade Yang,
We invite you to download the latest version of Revolution Sliders (6.6.12) from the following page: https://www.8theme.com/downloads/. After unzipping the package, please go to Dashboard > XStore > Plugins Installer > install and activate the Slider revolution plugin.
Please note that Revolution Slider authors only allow the use of Premium features for those who purchase an individual license. Therefore, if you wish to use Revolution Slider add-ons or the Template Library, you will need to purchase a license.
You can find some free templates here: https://www.8theme.com/downloads. Premium templates will only be available after plugin registration.
We thank you for your interest and look forward to hearing from you.
Best Regards,
8Theme’s Team