Hey Laserzwei!
I'm loving this mod (and your others), but I still find that I can't buy/sell with my complexes even after you released the .86 update.
And using the BetterTransfer : UI Upgrade mod, I can't actually transfer cargo or crew with complexes, either.
The buttons will show up when I first select the complex and press F, but if I de-select and re-select them the buy/sell and transfer crew/cargo options are both not on the list. When clicking buy/sell it just does nothing, and when I open the crew/cargo transfer window it pops up normally, yet doesn't let any items move back and forth.
Any ideas? Also, kudos for the great work so far! I love your ideas, and your inspiration from X3 really makes me see a ton of potential for this game. After ~1,000 hours of X3TC and AP, I'm ready for more!