Hello Tim,
we are sorry for the inconvenience caused. We have fixed the issue with acquiring the license and we are preparing an updated version.
In the meantime, can you please try to run the reconstruction, minimize the progress bar and then click Save or Save As to save the project? In this case, project is not saved immediately but will be saved after the reconstruction process finishes. RC is executing the tasks in a row. This workaround could help you to save the results even if the error message appears.