RCB Script Installer is an auxiliary application that comes to solve a problem left by another. The thing is that Right Click Booster (RCB), an app by the same developer, cannot install scripts due to one of the rules of the Apple App Store, where you can download it from. This is when a tool like RCB Script Installer comes to the rescue by offering to install the desired scripts for you.
An application with such a simple purpose could not possibly be complex to use. In this respect, there are various ways to install a new script on your system. The one that is probably easier is by taking advantage of its perfect integration with Right Click Booster. Thus, with a right click, you can ask the tool to install the selected script. Likewise, you can proceed to install all the scripts instead of a specific one.
The thing is that this tool is not among those that are definitely necessary to perform its task. In fact, it would also work if you simply copied the scripts files and dropped them on the user script directory. However, you should know what directory it is. The product is free to use.