I am using dnn 4.8.4 version in my project, this site is in 2 language,whenver i click on the BYNow Button it shows a error Default.aspx?tabid=67&error=Index+was+out+of+range.+Must+be+non-negative+and+less+than+the+size+of+the+collection.%0d%0aParameter+name%3a+index&content=0I got one suggesation that i need to reinstall the catalook,but not able to reinstall it can any one suggest me how can i uninstall catalook and install it again ?