DELFT3D FM suite 2019 installation - Forum - Delft3D Flexible Mesh

I have installed all the necessary files and read the license file through flex manager. Unfortunately, i ma getting the same error, "unregistered version". Snapshot of same is attached for reference and detail of the error. Kindly help about how to overcome this error. I tried running both Delft3D FM suite and Delft3D 4.0, but it is not responding.