Solidworks 2014 x64 Student edition won't open any file, not even generate a new file.

Solidworks 2014 x64 edition won't open any file, not even generate a new file. After the installation, I had a problem with the Activation/Reactivation, wich I solved very easily re-naming the FLEXnet folder to to FLEXnet_old according to this post Could not initiate the transaction? .

Solidworks was then able to open.But whenever I try to open a file or to create a new part (or assembly or drawing) file, it keeps loading for a while and nothing happens at the end.After that the window program does not respond pops up. Can anybody help me please?

SolidworksGeneral