Hi Jane,
The Account Group ranges and financial statements are not 'linked' in the Adagio Financial Reporter. If you make changes to the account groups, they will not affected previously created reports. Also, if you convert specifications from Plus they are essentially 'static', though you certainly can edit them by adding new rows or columns and copy/paste formulas for new accounts or fields.
However I think you'll find it easier to recreate the specs using the drag and drop from the Account Group tree. This is true especially since you can add SmartSheet functionality to your form, such as automatically generating rows for newly added accounts.
If you haven't attended a webinar before, this would be an opportunity to see more of what you can do with the Financial Reporter apart from only converting DOS specs.