If you ran a business with your ex, splitting the house and matrimonial assets is one thing, splitting the business is quite another.
Even the most straightforward of businesses will be complicated enough to divide and it may be prudent to speak to an accountant in the very early stages to assess where you are and how they best recommend the hammer to fall.
Once this has been established, the solicitors will have to draw up agreements to reflect your decisions but of course, you still have to make the ultimate choice of whether you continue to work together or not.
Nobody can best advise you. You are the only person who can make that decision and if you have an analytical business mind, I hope it helps you calmly lay out the potential consequences of taking the Yes or the No path.
Good luck with your decision.