Welcome Alok Kapoor,
from your statements it is not clear what your problem is. Can you clarify this please.
The DWG support in LibreCAD is marginal, there may be issues opening DWG files in LibreCAD.
Even if you can open a DWG file in LibreCAD you can save it only in DXF format.
DWF is a format not supported in LibreCAD.
True View is only a viewer, it doesn't convert formats or let you modify drawings as far as I know.
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