If you are a legitimate developer maintaining the legacy code and have lost your key, please contact the original vendor directly for recovery options.
This article clarifies the licensing for ModRSSim and provides steps for using it and its modern successor, . What is ModRSSim? modrssim registration key new
Use this if you are talking about a specific, unique key that has just been released or assigned to you. "A new Modrssim registration key" If you are a legitimate developer maintaining the