Hi,
I'm having the same problem. I've tried adding an environmental variable. It makes your SOPC builder to open in v7.0 appearence. I tried the same things.After adding and launching SOPC, the system successfully generated, but again I got another problem. The older SOPC didn't create the ".sopcinfo" file.(Older version's file system is a little different i think.) Thus, I can't create a project which is using this system i created, on niosIIv9.1. Unless i can launch SOPC in 9.1 in normal ways, i won't be able to create a proper and useable system.
(Linux might be better i've never used linux befor so I can only use windows. A little help on windows would realy help :) )
Again any help would be great.
EDIT: I tried on virtual machine too. I don't get a problem about USB connection. I used the board succesfully. But again, SOPCv9.1 didn't started.
-srht