Plugins

I bought some weeks ago the “Highend” Them and it is already installed. I am having troubles with it. It ask me to install some recommended plugins, but when I try to install it responds that there is a failure on the installing process. I have already downloaded to my computer and tried to install them manually from it, but it says that it is already installed…. and I cannot uninstalled them cause’ I just cant find them in my dashboard… The plugins are: Essential Grid, LayerSlider WP and Revolution Slider.

Soryy for my poor english…