@CEH, I also wonder about your statement that you “discontinued a former line of business.” If you mean you terminated an old business entity and started a new one, even under the same ownership structure, then nothing from the old business should be carried forward in any way. You should instead continue the books of that old business until all economic activity is complete, even though you may not be actively pursuing that endeavor anymore. Accounts payable from that old business are not relevant to the new one. And they are certainly not accrued expenses of a new business. In fact, they are not accrued expenses of any business, because they have already been incurred, even though not yet paid.
If you have merely given up a product or service line in the same business entity, relevant transactions should be handled in the same way as those for current product or service lines. The issue of making the transition to Manager is separate. Either way, the Guide @Brucanna referred to could be relevant.
Additionally, understand that
Accounts payable is a control account made up entirely of subaccounts for suppliers. Nothing appears in it unless entered properly, including by designating that supplier.