importing Records from Accounting version

Hi All, I have been in business since 2016 but have just recently purchase Sage 50 Accounting - Canadian Edition and completed the Level 2 Accounting Modules e-learnings.

My current accounting firm uses Sage - Accounting version however they will not work with my accountant's copy (due to possible hacking?)

I've manually entered the chart of accounts that they provided but I'm finding entering historical data tedious as everything is on paper right now.  I've asked my accounting firm to export records for Accounts, Vendors, Customers and Employees but they say it won't work as they have the Accounting version. Is this correct?

If this is correct, is the only way to enter historical information is to ask for the Aged Detail Report for accounts, customers and vendors?