Hello Ken
This may sound silly - however, just in case...are you sure you are pointing to the correct data when you try to open the Ledger itself? Is the drive and path and data extension the one you are looking at when you open the AP module?
This is an easy thing to overlook and we have been known to do this ourselves!
I have never heard of this problem before, and find it hard to believe that removing a few dormant GL Accounts would cause this.
Your Dealer emailed us this morning, and I have responded to him. We have asked him to send us a zip of your GL data, if possible. This would allow us to do some testing here, if you are indeed pointing to the correct dataset.
Regards,