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I would suggest that you make a formal demand for the return of the funds that he has taken now and in the past. You can say that you consulted with a lawyer about this issue, and that the amended operating agreement, that he signed, does not provide for these fees. You can also tell him that you are prepared to file litigation if he is not willing to return the funds, and that he may be subject to payment of your attorneys fees if it comes to that, but that you expect that he will just provide you with a refund of the fees.
Good luck to you. I wish you all the best.