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BusTools/1553 Upgrade 7.20
- Customers who have a version of BT-1533 older than v6.21 need to first upgrade from whatever they have to v6.21 and then from v6.21 to the latest version (v7.20 in this case).
- Customers who have version 6.21 or anything newer can directly upgrade to the latest version (v7.20).