Working nios 9.01 on windows 7

Hi there fellow programmers!

Successfully got my windows 7 box running & compiling small projects (just to test the installation)

But now when I open a work related project, I get an error saying that it couldn't open the file as the file wasn't compatible?

Anyone else had this issue?

I'm considering a dual boot just to negate this problem.. (I'm safe under XP!)

Thanks,

MRb