cad for windows 7 64 bit download
1, double click the zwcad package downloaded, and decompress it.
2, in the dialog box, choose a directory you want, the default directory is: C: \ zwcad \. It is advised that do not decompress it to disk C and change to the hard disk with large capacity.
3, double click the decompressed installation package and then it will be operated in administrator mode.
4, complete the software installation according to installation guide
5, activate the software with 30 days free of charge
dgn to dwg
sketchup import dwg