Slider Settings not showing installed plugin Revolution Slider Option

Hi,

I have installed the theme and everything seems to be fine.

I cannot not replace the slider on the home page with the Revolution Slider as I can not select because it is not shown on the drop down list,

I have installed and uninstalled theme as well as the Revolution Slider plugin but still no success.

I am able to place the Revolution Slider using short code on the home page but then Revolution Slider shows at the bottom of the home page with rest of the stuff above it.

Can you please assist?

Thank you