AutoSketsch R10 / Windows 7, 64 bit
If i have saved a drawing file into skf-format it is inpossible to save a copy in dwg-format.
If in my AS (v9), Save-As options include: (Quote)
AutoCAD 2000 DXF (.*DXF)
AutoCAD 2000 Drawing (.*DWG)
AutoCAD 2004 DXF (.*DXF)
AutoCAD 2004 Drawing (.*DWG)
AutoCAD R12/LT2 DXF (.*DXF)
AutoSketch v7/v8 (*.SKF)
Autodesk Design Web Format (*.DWF)
Windows Metafile (*.WMF)
V10 must ‘at least’ have the above, .. I would have thought. (?).
I don't have 10 handy at the moment, but from memory it does the same as the above formats (might also have AutoCAD 07 but I'm not certain).
However I find DWG unreliable (some things don't save, some programs complain about opening them) and use DXF.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.