if its xp 32 bit you wont be able to use the editor, you have to switch to a 64 bit version,btw i never used the editor in my life.
for the output yes its like u say and its a bug never solved,but not much of a hassle if you ask me, since youll better monitor on stage with an frfr cab instead of a regular amp.for the expansion install, well some guys have had some problems but in the end everyone solved and installed.
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Sometime what you Want aint what you need.