The app will start a MATLAB session with the specified resources. Currently, only the R2021b release with Parallel Computing and Compiler SDK toolboxes is installed.
In addition to computing resources, partition and project, there is an optional "License file" field. With it you can specify path to your own home organisation's license server to obtain MATLAB license from there instead. This option is useful, for example, in situations where all CSC's MATLAB licences are already reserved.