[Theme Horse Support Team]

Hi YourNetSolutions,
We have update our theme compatible to WordPress 4.0 and disable some function that make error for the site.
Login to our site with the same username and password while you have purchase the theme and download the latest version of the theme.
If you have still one year subscription you will have access to the download the update file.
IF you have not customise the code then you can delete the perviously installed theme and install it. You got theme install failed because there is already same file in you ftp.
Before deleting any theme its a good idea to backup files.

Thank you!