It might have been feasible to migrate the data to another account management software using a script to export ledger data to a widely supported format like QI

It might have been feasible to migrate the data to another account management software using a script to export ledger data to a widely supported format like QIF (https://en.wikipedia.org/wiki/Quicken_Interchange_Format https://en.wikipedia.org/wiki/Quicken_Interchange_Format)