I guess I have misunderstood the topic of this thread. I now understand that you are trying to solve the issues documented at:
Another link worth considering:
Now, what is it that prevents relicensing FreeMind to GNU GPL V3? FreeMind is currently on V2+, so upgrading to V3 should be possible, as far as I can see. Are there any problems that an upgrading to GPL V3 would create? And are there any problems that such an upgrade would leave unresolved?