Joern wrote: I am a bit desperate because I need to work with a certain file right now, but cannot make the programme work since the old 3.0 version has been overwritten.
Please do the following;
1.Completely uninstall QCAD.
2.Click on windows start icon.
3. In the 'search programs and files
' field type in the following - %appdata%.
4. In the 'Roaming' folder, completely delete the QCAD folder with all its contents.
5. Now re-install version 3.
Any further problems, please report back.