hi. how to remove any website x5 name or meta tags created in source code file.

if we have purchased the software, then we have the rights over it. I make website for my clients, and charge them. It is now a fact that many people are aware and do right click on website and view the source code. and in the source code there are tags showing website x5 name. after looking at that they ask all sorts of weird questions. Kindly tell me a easy way to remove it. and if there isnt any then you shud probably add it in the next version of website x5. and when is the new version of website x5 to realse?