DXFIX-ACAD10 C2
R10 c2 and R10 c7 are not all that different; it certainly shouldn't be a
problem. There are no switches; R10 is R10 and R11 is R11. Can you give
us some details? An error message, for instance? How do you transport the
DWG/DXF files? Maybe you could upload a small sample for us to try?
The update from R10 c2 to R10 c7 is free, by the way.