ROBOLAB doesn't appear to be on a payment plan. The official website lists version 2.9.4d as being available for downloading. Head to the page and you can download the application for free. Keep in mind that you still need LabVIEW in order to load the VI files.
On the official page, there are also instructions on how to install it properly. For the zipped versions (PC & Mac), extraction is not necessary as you can load the packages as they are.