app parameters for PRA - BT Desktop Agent based app launch and cred injection

Hello! is there any documentation that includes example parameters/strings that should be used while launching apps using PRA BT desktop agent. Admin guide has details of configuration options but nothing further e.g. example strings. I am able to connect to RDP using first set of  credentials , at one time was able to launch web browser but later started seeing error in chat windows that says file name/path could not be found.