I cannot find the autorization file on the dongle.
The AUTHOR.INI file is sent to you separately by e-mail or you can download it directly from the Dlubal Software extranet.
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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions