ArCon projects can be exported to plenty of other file formats, including plain pictures or 2D/3D CAD formats, including DWG from AutoCAD. No other program probably can handle these projects, so it seems to be the only choice available.
Convert ArCon project file to AutoCAD drawing.
We found one software available in the database for this conversion.
Microsoft Windows software - convert acp to dwg on Windows
A software for architects and interior designers
Convert from acp file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.