The License sets up the license information (Figures 1, 2, 3).
Very often it is not possible to use the mail API included in jems due to a 2 steps identification process or a firewall. In such a case it is simple to copy/paste the whole content of the text field. The text is yellow when selected. Please fill in the info requested (Name, Firts name, etc) (Fig. 4).
The following information is absolutely needed to generate the license code:
When the license code is not valid a error message is displayed and only cubic crystals and only a few zone axis [uvw] can be used for simulations (Fig. 5).