Hi @bousraou,

I hope you are well today and thank you for your questions.

1. I cannot choose the slider must be show , i have slider in back office but not in front, how resolve it ?

Please edit your site home page and make sure that you are using the slider on it which exist in the slider revolution plugin.

Please also see https://support.shufflehound.com/forums/topic/slider-revolution-wont-show-slides-in-6-x-versions/#post-49377

2. how to upgrade revolution slider module ? where is the code activation ?

If you have not purchased slider revolution plugin and using the plugin bundled with the theme then you are not direct customer of that plugin so can not activate that plugin.

Please see more information about this on the following pages.

https://www.themepunch.com/faq/purchase-code-registration-faqs/#1447194367831-7941a825-85b2

https://www.themepunch.com/faq/update-to-5-0-via-ftp/

To use the plugin you don’t need activation code, you can just install and activate the plugin from Appearance -> Install Plugins

Best regards,
Shufflehound team